Clinical characteristics and outcomes among hospitalised COVID-19 patients across epidemic waves in Spain: An unCoVer analysis Adrián Peláez; Nerea Ruiz del Árbol; Antonio Vázquez Sellán; José María Castellano; Joan B. Soriano; Julio Ancochea; José L. Peñalvo;

Retrospective study of the effect of vaccination against SARS-CoV-2 in seriously ill patients admitted to an intensive care unit Juan Carlos Rodríguez-Borregán; Elena Cuenca-Fito; Yhivian Peñasco; Carmen Huertas Marín; Trinidad Dierssen-Soto; Alba Fernández; Raquel Ferrero-Franco; Alejandro González-Castro;

Role of statins in clinical evolution of octogenarian patients admitted due to COVID-19 Carla Jiménez Martínez; Victoria Espejo Bares; Verónica Artiaga de la Barrera; Cecilia Marco Quirós; Elia Pérez Fernández; Maria Luz Martínez Mas; Javier Botas Rodríguez;