Beneficial and harmful outcomes of tocilizumab in severe COVID‐19: A systematic review and meta‐analysis. - Rubio‐Rivas, Manuel; Forero, Carlos G.; Mora‐Luján, José María; Montero, Abelardo; Formiga, Francesc; Homs, Narcís A.; Albà‐Albalate, Joan; Sánchez, Laura; Rello, Jordi; Corbella, Xavier (Pharmacotherapy, 2021)