Prolonged Low-Dose Methylprednisolone in Patients With Severe COVID-19 Pneumonia. - Salton F; Confalonieri P; Meduri GU; Santus P; Harari S; Scala R; Lanini S; Vertui V; Oggionni T; Caminati A; Patruno V; Tamburrini M; et al. (Open forum infectious diseases, 2020)