Efficacy and Safety of Corticosteroid Use in Coronavirus Disease 2019 (COVID-19): A Systematic Review and Meta-Analysis. - Cui, Yuqing; Sun, Yali; Sun, Junyi; Liang, Huoyan; Ding, Xianfei; Sun, Xueyi; Wang, Dong; Sun, Tongwen (Infectious Diseases & Therapy, 2021)