Olga P. Nyssen¹, Laimas Jonaitis², Ángeles Pérez-Aísa³, Dino Vaira⁴, Giulia Fiorini⁴, Ilaria Maria Saracino⁴, Bojan Tepes⁵, Dmitry Bordin⁶, Alma Keco- Huerga⁷, Manuel Castro-Fernández⁷, Alfredo Lucendo⁸, Liudmila Vologzhanina⁹, Luis Bujanda¹⁰, Natasa Brglez Jurecic¹¹, Maja Denkovski¹¹, Angel Lanas¹², Samuel Martínez-Dominguez¹², Enrique Alfaro¹², Marcis Leja¹³, Renate Bumane¹³, Emin Mammadov¹⁴, Gulustan Babayeva¹⁴, Umud Mahmudov¹⁵, María Caldas¹, Luis Rodrigo¹⁶, Frode Lerang¹⁷, Galyna Fadieienko¹⁸, Rustam Abdulkhakov¹⁹, Jose María Huguet Malavés²⁰, Oleg Zaytsev²¹, Tatiana Ilchishina²², Luis Fernández-Salazar²³, Noelia Alcaide²³, Benito Velayos²³, Aiman Silkanovna Sarsenbaeva²⁴, Igor Bakulin²⁵, Antonietta G. Gravina²⁶, Marco Romano²⁶, Mónica Perona²⁷, Sergey Alekseenko²⁸, Jesús Barrio²⁹, Miguel Areia³⁰, Óscar Nuñez³¹, Pavel Bogomolov³², Blas José Gómez Rodríguez³³, Manuel Dominguez- Cajal³⁴, Judith Gomez Camarero³⁵, Manuel Jiménez Moreno³⁵, Sotirios Georgopoulos³⁶, Pedro Almela Notari³⁷, Ante Tonkic³⁸, Rinaldo Pellicano³⁹, Halis Simsek⁴⁰, Lumír Kunovský⁴¹, Antonio Gasbarrini⁴², Jose Maria Botargues Bote⁴³, Gyorgy M Buzas⁴⁴, Miguel Fernández-Bermejo⁴⁵, Perminder Phull⁴⁶, Marino Venerito⁴⁷, Peter Malfertheiner⁴⁷, Rosa Rosania⁴⁷, Alexander Link⁴⁷, Eduardo Iyo⁴⁸, Juozas Kupinskas², Oleg Shvets⁴⁹, Ricardo Marcos Pinto⁵⁰, Theodore Rokkas⁵¹, Ilkay Simsek⁵², Sinead Smith⁵³, Doron Boltin⁵⁴, Dominique Lamarque⁵⁵, Daniela Dobru⁵⁶, Wojciech Marlicz⁵⁷, Vladimir Milivojevic⁵⁸, Lyudmila Boyanova⁵⁹, Vincent Lamy⁶⁰, Michael Doulberis⁶¹, Peter Bytzer⁶², Lisette Capelle⁶³, Oleksiy Gridnyev⁶⁴, Ari Ristimaki⁶⁵, Anna Cano-Català⁶⁶, Ignasi Puig⁶⁶, Francis Mégraud⁶⁷, Colm O'Morain⁵³ y Javier P. Gisbert<sup>1

1</sup>Servicio de Aparato Digestivo, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-Princesa), Universidad Autónoma de Madrid (UAM), y Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Madrid. ²Lithuanian University of Health Sciences, Kaunas, Lituania. ³Hospital Costa del Sol, Redes de Investigación Cooperativa orientada a resultados en salud (RICORS), Marbella. ⁴Department of Surgical and Medical Sciences, University of Bologna, Italia. ⁵AM DC Rogaska, Slatina, Eslovenia. ⁶A.S. Loginov Moscow Clinical Scientific Center, Moscú, Rusia. ⁷Hospital de Valme, Sevilla. ⁸Hospital General de Tomelloso. ⁹Gastrocentr, Perm, Rusia. ¹⁰Hospital Donostia/Instituto Biodonostia, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Universidad del País Vasco (UPV/EHU), San Sebastián. ¹¹Interni oddelek, Diagnostic Centre, Bled, Eslovenia. ¹²Hospital Clínico Universitario Lozano Blesa, Zaragoza. ¹³Digestive Diseases Centre Gastro, Institute of Clinical and Preventive Medicine & Faculty of Medicine, University of Latvia, Riga, Letonia. ¹⁴Department of Therapy, Azerbaijan State Advanced Training Institute for Doctors named after A. Aliyev, Bakú, Azerbaiyán. ¹⁵Modern Hospital, Bakú, Azerbaiyán. ¹⁶Hospital de Asturias, Oviedo. ¹⁷Østfold Hospital Trust, Grålum, Noruega. ¹⁸Digestive Ukrainian Academy of Medical Sciences, Kyiv, Ucrania. ¹⁹Kazan State Medical University, Rusia. ²⁰Hospital General Universitario de Valencia. ²¹First Clinical Medical Centre, Kovrov, Rusia. ²²SM-clinic, Saint- Petersburg, Rusia. ²³Hospital Clínico Universitario, Valladolid. ²⁴Chelyabinsk Regional Clinical Hospital, Rusia. ²⁵North-western State Medical University St Petersburg, Rusia. ²⁶Università degli Studi della Campania "Luigi Vanvitelli", Napoli, Italia. ²⁷Hospital Quirón, Marbella. ²⁸Far Eastern State Medical University, Rusia. ²⁹Hospital Río Hortega, Valladolid. ³⁰Portuguese Oncology Institute Coimbra, Portugal. ³¹Hospital Universitario La Moraleja, Madrid. ³²Universal clinic - Private medical center, Moscú, Rusia. ³³Hospital Virgen Macarena, Sevilla. ³⁴Hospital San Jorge, Huesca. ³⁵Hospital Universitario de Burgos. ³⁶Athens Medical, P, Faliron General Hospital, Athens, Grecia. ³⁷Hospital General Universitario de Castellón. ³⁸University Hospital of Split, School of Medicine, University of Split, Croacia. ³⁹Outpatient clinic, Molinette-SGAS Hospital, University of Turin, Italia. ⁴⁰Internal Medicine, Hacettepe, University School of Medicine, Ankara, Turquía. ⁴¹Department of Gastroenterology and Internal Medicine and Department of Surgery, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, República Checa. ⁴²Medicina Interna, Fondazione Policlinico Universitario A, Gemelli IRCCS, Università Cattolica del Sacro Cuore, Roma, Italia. ⁴³Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat. ⁴⁴Ferencváros Health Centre, Budapest, Hungría. ⁴⁵Clínica San Francisco, Cáceres. ⁴⁶Aberdeen Royal Infirmary, Reino Unido. ⁴⁷Otto-von- Guericke University, Magdeburg, Alemania. ⁴⁸Hospital Comarcal de Inca, Mallorca. ⁴⁹Internal Medicine, National Medical University named after O,O,Bogomolets, Kyiv, Ucrania. ⁵⁰Centro Hospitalar do Porto Institute of Biomedical Sciences Abel Salazar, University of Porto, CINTESIS, University of Porto, Portugal. ⁵¹Henry Dunant Hospital, Athens, Grecia. ⁵²Dokuz Eylul University School of Medicine, Izmir, Turquía. ⁵³Trinity College Dublin, Irlanda. ⁵⁴Rabin Medical Center, Beilinson Campus, Petah Tikva; Israel. ⁵⁵Hôpital Ambroise Paré,Université de Versailles St-Quentin en Yvelines, Boulogne Billancourt, Francia. ⁵⁶Targu Mures Emergency Hospital, Târgu Mure, Rumanía. ⁵⁷Pomeranian Medical University, Szczecin, Polonia. ⁵⁸Clinical Center of Serbia and School of Medicine, University of Belgrade, Serbia. ⁵⁹Medical Microbiology, Medical University of Sofia, Bulgaria. ⁶⁰CHU de Charleroi, Charleroi, Bélgica. ⁶¹KSA Kantonsspital Aarau, Aarau, Suiza. ⁶²Clinical Medicine, Zealand University Hospital, Copenhagen University, Copenhagen, Dinamarca. ⁶³Meander Medical Center, Amersfoort, Países Bajos. ⁶⁴Government Institution 'L.T. Malaya Therapy National Institute of the National Academy of Medical Sciences of Ukraine', Kharkiv, Ucrania. ⁶⁵Department of Pathology, HUSLAB, HUS Diagnostic Center, Helsinki University Hospital; Medicum and Applied Tumor Genomics, Research Programs Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finlandia. ⁶⁶GOES research group, Althaia Xarxa Assistencial Universitària de Manresa. ⁶⁷INSERM 1053, Université de Bordeaux, Francia.