Efficacy and safety of umbilical cord mesenchymal stem cells for the treatment of patients with COVID-19 Fengtao Wei; Dexiao Kong; Tao Li; Ai Li; Yi Tan; Jinfeng Fang; Xianghua Zhuang; Chao Lai; Weihua Xu; Hong Dong; Chengen Ma; Ke Hong; Yuqin Cui; Shengbin Tang; Fenggang Yu; Chengyun Zheng;

Role of tomography in the screening at the emergency room during pandemics Marcel Lima Albuquerque;

Effect of vitamin D3 on antiphospholipid antibodies in hospitalized patients with moderate to severe COVID-19 Lucas P. Sales; Lucas V.B. Souza; Alan L. Fernandes; Igor H. Murai; Mayara D. Santos; Margarete B.G. Vendramini; Ricardo M. Oliveira; Camille P. Figueiredo; Valéria F. Caparbo; Bruno Gualano; Rosa M.R. Pereira;