Effect of continuing the use of renin–angiotensin system inhibitors on mortality in patients hospitalized for coronavirus disease 2019: a systematic review, meta-analysis, and meta-regression analysis. - Liu, Qi; Fu, Wei; Zhu, Chang-ju; Ding, Zi-heng; Dong, Bin-bin; Sun, Bao-qing; Chen, Rong-chang (BMC Infectious Diseases, 2023)