Early Initiation of Corticosteroids Might be Harmful in Patients Hospitalized With COVID-19 Pneumonia: A Multicenter Propensity Score Analysis Luis A. Pérez de Llano; Rafael Golpe; Diego Pérez-Ortiz; Rosario Menéndez; Pedro P. España Yandiola; Amaia Artaraz; Rafael Zalacain; Catia Cilloniz; Antoni Torres;