Navigating the waves in Colombia: a cohort study of inpatient care during four COVID-19 waves David E. Rebellón-Sánchez; Tania M. Guzmán; Sarita Rodriguez; Julio Llanos-Torres; Daniela Vinueza; Eric Tafurt; Estefanía Beltrán; Álvaro Martínez; Fernando Rosso;

Tocilizumab or glucocorticoids treatment for patients with SARS-CoV-2 pneumonia: An observational study Giovanni Dolci; Giulia Cassone; Giulia Besutti; Romina Corsini; Fabio Sampaolesi; Valentina Iotti; Elena Galli; Adalgisa Palermo; Matteo Fontana; Pamela Mancuso;

Coronavirus persistence in human respiratory tract and cell culture: An overview Adriana Gaspar-Rodríguez; Ana Padilla-González; Evelyn Rivera-Toledo;