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Proposed recommendations for antithrombotic prophylaxis for children and adolescents with severe infection and/or multisystem inflammatory syndrome caused by SARS-CoV-2
Jorge David Aivazoglou CarneiroI,
Corresponding author
jorge.carneiro@hc.fm.usp.br

Corresponding author.
, Gabriel Frizzo RamosII, Werther Brunow de CarvalhoII, Cíntia JohnstonII, Artur Figueiredo DelgadoII
I Unidade de Hematologia, Departamento de Pediatria, Instituto da Crianca e do Adolescente (ICr), Hospital das Clinicas (HCFMUSP), Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
II Unidade de Terapia Intensiva, Departamento de Pediatria, Instituto da Crianca e do Adolescente (ICr), Hospital das Clinicas (HCFMUSP), Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="para10" class="elsevierStylePara elsevierViewall">Since the end of December 2019&#44; the world has been in the midst of the coronavirus disease &#40;COVID-19&#41; pandemic &#40;<a class="elsevierStyleCrossRefs" href="#bib1">1&#8211;3</a>&#41;&#46; The clinical spectrum of this disease&#44; caused by severe acute respiratory syndrome coronavirus 2 &#40;SARS-CoV-2&#41;&#44; ranges from asymptomatic to severe respiratory failure&#46; In pediatric patients&#44; in addition to respiratory symptoms&#44; other findings&#44; such as abdominal pain&#44; diarrhea&#44; vomiting&#44; and skin rash are frequently reported &#40;<a class="elsevierStyleCrossRefs" href="#bib4">4&#8211;6</a>&#41;&#46;</p><p id="para20" class="elsevierStylePara elsevierViewall">Since March 2020&#44; pediatricians in the United Kingdom and other European countries have observed children hospitalized with SARS-CoV-2 who have subsequently developed severe infection and&#47;or multisystem inflammation&#46; Some of these children have developed shock and multiple organ dysfunction&#44; requiring intensive care&#44; and their disease presentation had some similarities with Kawasaki&#39;s disease or toxic shock syndrome &#40;<a class="elsevierStyleCrossRef" href="#bib7">7</a>&#44;<a class="elsevierStyleCrossRef" href="#bib8">8</a>&#41;&#46;</p><p id="para30" class="elsevierStylePara elsevierViewall">Therefore&#44; multisystem inflammatory syndrome in children &#40;MIS-C&#41;&#44; temporally associated with infection by SARS-CoV-2&#44; has become a concern among pediatricians in the ongoing worldwide pandemic &#40;<a class="elsevierStyleCrossRef" href="#bib9">9</a>&#41;&#46;</p><p id="para40" class="elsevierStylePara elsevierViewall">We performed a search on PubMed using the keywords &#8220;antithrombotic prophylaxis&#8221;&#44; &#8220;children&#8221;&#44; &#8220;adolescents&#8221;&#44; and &#8220;COVID-19&#8221;&#44; and did not find any results regarding thromboprophylaxis use in pediatric patients with COVID-19&#46;</p><p id="para50" class="elsevierStylePara elsevierViewall">Therefore&#44; the aim of the present study was to propose potential recommendations for antithrombotic prophylaxis for children and adolescents with COVID-19&#44; based on the peculiar hemostatic characteristics and thrombotic risk factors for venous thrombosis in children&#44; following general guidelines for antithrombotic therapy in this population &#40;<a class="elsevierStyleCrossRef" href="#bib10">10</a>&#41;&#46;</p><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle10">Hemostasis in children and adolescents&#58; ontogenetic characteristics and impact on pediatric thromboembolism</span><p id="para60" class="elsevierStylePara elsevierViewall">During phylogenetic evolution&#44; living beings develop a regulatory hemostatic system for protecting the cardiovascular system&#46; In humans&#44; the hemostatic system has a peculiar ontogenesis&#44; which consists of a dynamic evolutionary process deeply influenced by age&#46; The term &#8220;developmental hemostasis&#8221; has been used since the 1990s to describe age-dependent changes in the hemostatic system&#44; as seen in <a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a> &#40;<a class="elsevierStyleCrossRef" href="#bib11">11</a>&#41;&#46; Children are physiologically protected from thromboembolic events due to a decreased capacity for thrombin generation&#46; Thromboses in children are usually related to previously identified risk factors&#44; and only 5&#37; of cases are classified as idiopathic&#44; whereas in adults&#44; this rate reaches 40&#37;&#46; The most frequent risk factors for pediatric venous thromboembolism are catheter use&#44; infections&#44; surgery&#44; trauma&#44; cancer&#44; kidney disease&#44; obesity&#44; and diabetes &#40;<a class="elsevierStyleCrossRef" href="#bib12">12</a>&#44;<a class="elsevierStyleCrossRef" href="#bib13">13</a>&#41;&#46;</p><elsevierMultimedia ident="tbl1"></elsevierMultimedia></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle20">Hemostatic changes associated with COVID-19</span><p id="para70" class="elsevierStylePara elsevierViewall">Infection of the respiratory system and endothelial cells by SARS-CoV-2 causes an intense inflammatory response that includes the activation of the hemostatic system&#44; known as immunothrombosis or thromboinflammation &#40;<a class="elsevierStyleCrossRef" href="#bib14">14</a>&#44;<a class="elsevierStyleCrossRef" href="#bib15">15</a>&#41;&#46;</p><p id="para80" class="elsevierStylePara elsevierViewall">The inflammatory process involving the vascular alveolar endothelium&#44; even in the initial stages&#44; can trigger the formation of pulmonary clots and neutrophil extracellular traps&#44; which develop to limit infection and viral spread &#40;<a class="elsevierStyleCrossRef" href="#bib16">16</a>&#44;<a class="elsevierStyleCrossRef" href="#bib17">17</a>&#41;&#46; These microthrombi may not be easily detected on computed tomography scans because of their small size and because they are limited to the peripheral microvasculature&#46; When not treated&#44; the intense inflammation or cytokine storm can lead to microthrombi expansion&#44; which can manifest clinically as worsening respiratory failure&#44; and radiologically as changes in pulmonary perfusion &#40;<a class="elsevierStyleCrossRef" href="#fig1">Figure 1</a>&#41; &#40;<a class="elsevierStyleCrossRefs" href="#bib18">18&#8211;19</a>&#41;&#46;</p><elsevierMultimedia ident="fig1"></elsevierMultimedia><p id="para90" class="elsevierStylePara elsevierViewall">Therefore&#44; patients with COVID-19 are prone to develop not only inflammation and hypoxia&#44; but also thromboses&#44; such as pulmonary embolism &#40;20 to 30&#37;&#41;&#44; deep venous thrombosis&#44; catheter-associated thrombosis&#44; and arterial thromboses&#44; such as stroke and coronary ischemia&#46; Additionally&#44; microvascular thrombosis&#44; acrosyndrome&#44; and capillary leak&#44; which affect the lungs&#44; kidneys&#44; and heart&#44; add the potential complication of multiple organ dysfunction syndrome &#40;MODS&#41; &#40;<a class="elsevierStyleCrossRef" href="#bib20">20</a>&#44;<a class="elsevierStyleCrossRef" href="#bib21">21</a>&#41;&#46;</p><p id="para100" class="elsevierStylePara elsevierViewall">D-dimer levels have been reported to be the best test for assessing hemostatic changes associated with COVID-19&#46; Several publications have correlated the high concentration of D-dimer with an unfavorable prognosis&#46; Platelet count is usually normal until the patient reached advanced stages of the disease&#44; when mild to moderate thrombocytopenia are observed&#46; Prothrombin time is also normal in most patients&#44; while a significant increase is observed in those who are critically ill&#46; Fibrinogen remains high&#44; except in terminally ill patients&#44; in whom a sharp decrease will occur &#40;<a class="elsevierStyleCrossRef" href="#bib22">22</a>&#41;&#46;</p><p id="para110" class="elsevierStylePara elsevierViewall">Through June 2020&#44; there have been case reports of thrombosis associated with catheter use during MIS-C in pediatric patients&#46; Although there are recommendations for COVID-19 management regarding respiratory support&#44; anti-inflammatory treatment&#44; and antiviral therapy&#44; guidelines regarding thrombotic risk assessment and anticoagulation management of hospitalized children with COVID-19 remain absent &#40;<a class="elsevierStyleCrossRef" href="#bib23">23</a>&#44;<a class="elsevierStyleCrossRef" href="#bib24">24</a>&#41;&#46; Additionally&#44; the reported antithrombotic prophylaxis regimens are specific to each tertiary hospital&#44; and are largely based on current adult guidelines &#40;<a class="elsevierStyleCrossRefs" href="#bib25">25&#8211;27</a>&#41;&#46;</p></span><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle30">Proposed recommendations for antithrombotic prophylaxis in children and adolescents hospitalized with COVID-19</span><p id="para120" class="elsevierStylePara elsevierViewall">Our institutional recommendations &#40;ICr-HCFMUSP&#41; &#40;<a class="elsevierStyleCrossRef" href="#bib28">28</a>&#44;<a class="elsevierStyleCrossRef" href="#bib29">29</a>&#41; were adapted from two references &#40;<a class="elsevierStyleCrossRef" href="#bib24">24</a>&#44;<a class="elsevierStyleCrossRef" href="#bib30">30</a>&#41;&#46; We recognize that as more children and adolescents with COVID-19 are treated&#44; these recommendations will likely need some modifications&#46;<ul class="elsevierStyleList" id="celist10"><li class="elsevierStyleListItem" id="celistitem10"><span class="elsevierStyleLabel">1&#41;</span><p id="para130" class="elsevierStylePara elsevierViewall">Target population for antithrombotic prophylaxis</p><p id="para140" class="elsevierStylePara elsevierViewall">Patients under 18 years of age who are hospitalized with a diagnosis of COVID-19 and present two or more of the following criteria should be considered for prophylactic anticoagulation&#44; after their evaluation by the pediatric hematology staff&#58;<ul class="elsevierStyleList" id="celist20"><li class="elsevierStyleListItem" id="celistitem20"><span class="elsevierStyleLabel">a&#41;</span><p id="para150" class="elsevierStylePara elsevierViewall">Admission to the intensive care unit&#46;</p></li><li class="elsevierStyleListItem" id="celistitem30"><span class="elsevierStyleLabel">b&#41;</span><p id="para160" class="elsevierStylePara elsevierViewall">Diagnosis of multisystem inflammatory syndrome in children&#46;</p></li><li class="elsevierStyleListItem" id="celistitem40"><span class="elsevierStyleLabel">c&#41;</span><p id="para170" class="elsevierStylePara elsevierViewall">Risk factors for venous thromboembolism&#44; such as catheter use&#44; immobility&#44; estrogen therapy&#44; malignancy&#44; autoimmune disease&#44; sickle cell disease&#44; obesity&#44; nephrotic syndrome&#44; heart disease&#44; personal or family history of thrombosis&#44; hereditary thrombophilia&#44; and diabetes&#46;</p></li></ul></p></li><li class="elsevierStyleListItem" id="celistitem50"><span class="elsevierStyleLabel">2&#41;</span><p id="para180" class="elsevierStylePara elsevierViewall">Laboratory tests and monitoring</p><p id="para190" class="elsevierStylePara elsevierViewall">All hospitalized pediatric patients diagnosed with COVID-19 should undergo the following laboratory tests on admission&#58; blood count with reticulocytes&#44; inflammatory markers &#40;CRP&#44; ESR&#44; IL-6&#44; ferritin&#41;&#44; prothrombin time&#44; activated partial thromboplastin time &#40;APTT&#41;&#44; fibrinogen&#44; and D-dimer&#46; These values should be monitored regularly&#44; particularly in critically ill patients&#46; The interval between tests should be individualized based on clinical indications and availability of the tests&#46;</p></li><li class="elsevierStyleListItem" id="celistitem60"><span class="elsevierStyleLabel">3&#41;</span><p id="para200" class="elsevierStylePara elsevierViewall">Antithrombotic prophylaxis for hospitalized pediatric patients<ul class="elsevierStyleList" id="celist30"><li class="elsevierStyleListItem" id="celistitem70"><span class="elsevierStyleLabel">a&#41;</span><p id="para210" class="elsevierStylePara elsevierViewall">Pharmacological antithrombotic prophylaxis is preferred over mechanical prophylaxis&#46;</p></li><li class="elsevierStyleListItem" id="celistitem80"><span class="elsevierStyleLabel">b&#41;</span><p id="para220" class="elsevierStylePara elsevierViewall">Clinically stable patients who are on prophylactic or therapeutic anticoagulation should maintain anticoagulation at the same dose&#46;</p></li><li class="elsevierStyleListItem" id="celistitem90"><span class="elsevierStyleLabel">c&#41;</span><p id="para230" class="elsevierStylePara elsevierViewall">Enoxaparin should be initiated in clinically stable patients at the following doses&#58;</p><p id="para240" class="elsevierStylePara elsevierViewall">Weight &#8804;40 kg&#58; 1 mg&#47;kg&#47;dose&#44; once a day</p><p id="para250" class="elsevierStylePara elsevierViewall">Weight 40-80 kg&#58; 40 mg&#47;day</p></li><li class="elsevierStyleListItem" id="celistitem100"><span class="elsevierStyleLabel">d&#41;</span><p id="para260" class="elsevierStylePara elsevierViewall">Enoxaparin 1 mg&#47;kg&#47;dose&#44; twice a day should be initiated in patients at high risk for or already diagnosed thrombosis&#46;</p></li><li class="elsevierStyleListItem" id="celistitem110"><span class="elsevierStyleLabel">e&#41;</span><p id="para270" class="elsevierStylePara elsevierViewall">Patients who are clinically unstable and&#47;or have renal failure should receive unfractionated heparin at a dose of 10 IU&#47;kg&#47;hour &#40;APTT target 40-70 seconds&#41;&#46;</p></li></ul></p></li><li class="elsevierStyleListItem" id="celistitem120"><span class="elsevierStyleLabel">4&#41;</span><p id="para280" class="elsevierStylePara elsevierViewall">Other drugs and pharmacological thromboprophylactic contraindications<ul class="elsevierStyleList" id="celist40"><li class="elsevierStyleListItem" id="celistitem130"><span class="elsevierStyleLabel">a&#41;</span><p id="para290" class="elsevierStylePara elsevierViewall">Do not use oral anticoagulants &#40;warfarin&#44; rivaroxaban&#44; dabigatran&#44; edoxaban&#44; apixaban&#41;&#46;</p></li><li class="elsevierStyleListItem" id="celistitem140"><span class="elsevierStyleLabel">b&#41;</span><p id="para300" class="elsevierStylePara elsevierViewall">Antiplatelet agents are not recommended for venous thromboprophylaxis&#46; They should be used only in cases of Kawasaki disease&#44; according to specific protocols&#46;</p></li><li class="elsevierStyleListItem" id="celistitem150"><span class="elsevierStyleLabel">c&#41;</span><p id="para310" class="elsevierStylePara elsevierViewall">Contraindications for antithrombotic prophylaxis are shown in <a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>&#46;</p><elsevierMultimedia ident="tbl2"></elsevierMultimedia></li></ul></p></li><li class="elsevierStyleListItem" id="celistitem160"><span class="elsevierStyleLabel">5&#41;</span><p id="para320" class="elsevierStylePara elsevierViewall">Duration of pharmacological antithrombotic prophylaxis&#46; Studies in adults have shown that thromboprophylaxis should be maintained throughout hospitalization and for 6-14 days after discharge for patients with conditions that put them at a higher risk of thrombosis&#44; such as malignancy&#44; autoimmune disease&#44; nephrotic syndrome&#44; and immobilization &#40;<a class="elsevierStyleCrossRef" href="#bib24">24</a>&#44;<a class="elsevierStyleCrossRefs" href="#bib30">30&#8211;33</a>&#41;&#46; It is recommended&#44; however&#44; that all pediatric patients should be assessed by the pediatric hematology staff for individualized decisions&#46;</p></li></ul></p></span></span>"
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          "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Mechanisms of SARS-CoV-2 Infection on endothelial-lung tissue&#46; Adapted from Pfiefer S&#44; et al&#46; &#40;17&#41; and Teuwen LA&#44; et al&#46; &#40;18&#41;&#46;</p>"
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          "leyenda" => "<p id="TFN01t01" class="elsevierStyleSimplePara elsevierViewall">Adapted from Jaffray J and Young G &#40;12&#41;&#59; Factor II &#40;FII&#41;&#44; Factor VII &#40;FVII&#41;&#44; Factor IX &#40;FIX&#41;&#44; Factor X &#40;FX&#41;&#44; Factor V &#40;FV&#41;&#44; Factor VIII &#40;FVIII&#41;&#44; Factor XI &#40;FXI&#41;&#44; Factor XII &#40;FXII&#41;&#44; Factor XIII &#40;FXIII&#41;&#44; Plasma prekallikrein &#40;PK&#41;&#44; High molecular weight kininogen &#40;HMWK&#41;&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Birth&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">1 month&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">6 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">1-5 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">11-16 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Pro-coagulants</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="4" align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin K dependent FII FVII FIX FX&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">FV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">FVIII&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Contact factors FXI FXII PK HMWK&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">FXIII&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Fibrinogen&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Anticoagulants&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="4" align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Antithrombin</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#945;2 Macroglobulin&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">higher&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">higher&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">higher&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">higher&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">higher&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Protein C&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Protein S&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">lower&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">equal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spara20" class="elsevierStyleSimplePara elsevierViewall">Coagulation protein values at different ages in relation to those of adults&#46;</p>"
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          "leyenda" => "<p id="TFN01t02" class="elsevierStyleSimplePara elsevierViewall">Adapted from Orsi FA et al&#46; &#40;<a class="elsevierStyleCrossRef" href="#bib27">27</a>&#41;&#46;</p>"
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            0 => array:1 [
              "tabla" => array:1 [
                0 => """
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Anticoagulation&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">5&#46;&nbsp;\t\t\t\t\t\t\n
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                    0 => array:2 [
                      "titulo" => "Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan&#44; China&#58; a retrospective cohort study"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
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                            0 => """
                              F Zhou \n
                              \t\t\t\t\t\t\t\t
                              """
                            1 => """
                              T Yu \n
                              \t\t\t\t\t\t\t\t
                              """
                            2 => """
                              R Du \n
                              \t\t\t\t\t\t\t\t
                              """
                            3 => """
                              G Fan \n
                              \t\t\t\t\t\t\t\t
                              """
                            4 => """
                              Y Liu \n
                              \t\t\t\t\t\t\t\t
                              """
                            5 => """
                              Z Liu \n
                              \t\t\t\t\t\t\t\t
                              """
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                    0 => array:2 [
                      "doi" => "10.1016/S0140-6736(20)30566-3"
                      "Revista" => array:7 [
                        "tituloSerie" => "Lancet"
                        "fecha" => "2020"
                        "volumen" => "395"
                        "numero" => "10229"
                        "paginaInicial" => "1054"
                        "paginaFinal" => "1062"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/32171076"
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              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Coronavirus disease 2019 &#40;COVID-19&#41;&#58; Situation report - 64&#46;2020"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => """
                              World Health Organization \n
                              \t\t\t\t\t\t\t\t
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                      ]
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                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "WWW" => array:1 [
                        "link" => "Available from&#58; https&#58;&#47;&#47;www&#46;who&#46;int&#47;docs&#47;default-source&#47;coronaviruse&#47;situation-reports&#47;20200324-sitrep-64-covid-19&#46;pdf&#63;sfvrsn&#61;723b221e&#95;2"
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                      "titulo" => "A pneumonia outbreak associated with a new coronavirus of probable bat origin"
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                          "etal" => true
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                            0 => """
                              P Zhou \n
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                              XL Yang \n
                              \t\t\t\t\t\t\t\t
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                              XG Wang \n
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                              B Hu \n
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                              L Zhang \n
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                              W Zhang \n
                              \t\t\t\t\t\t\t\t
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                      "doi" => "10.1038/s41586-020-2012-7"
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                        "tituloSerie" => "Nature"
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                      "titulo" => "Characteristics of and Important Lessons From the Coronavirus Disease 2019 &#40;COVID-19&#41; Outbreak in China&#58; Summary of a Report of 72&#63;314 Cases From the Chinese Center for Disease Control and Prevention"
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                              Z Wu \n
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                              JM McGoogan \n
                              \t\t\t\t\t\t\t\t
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                      "titulo" => "SARS-CoV-2 Infection in Children"
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                          "etal" => true
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                            0 => """
                              X Lu \n
                              \t\t\t\t\t\t\t\t
                              """
                            1 => """
                              L Zhang \n
                              \t\t\t\t\t\t\t\t
                              """
                            2 => """
                              H Du \n
                              \t\t\t\t\t\t\t\t
                              """
                            3 => """
                              J Zhang \n
                              \t\t\t\t\t\t\t\t
                              """
                            4 => """
                              YY Li \n
                              \t\t\t\t\t\t\t\t
                              """
                            5 => """
                              J Qu \n
                              \t\t\t\t\t\t\t\t
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                      "doi" => "10.1056/NEJMc2005073"
                      "Revista" => array:7 [
                        "tituloSerie" => "N Engl J Med"
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                        "volumen" => "382"
                        "numero" => "17"
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                        "paginaFinal" => "1665"
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                      "titulo" => "Clinical manifestations of children with COVID-19&#58; A systematic review"
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                          "autores" => array:5 [
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                              TH de Souza \n
                              \t\t\t\t\t\t\t\t
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                            1 => """
                              JA Nadal \n
                              \t\t\t\t\t\t\t\t
                              """
                            2 => """
                              RJN Nogueira \n
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Article information
ISSN: 18075932
Original language: English
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es en pt

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos