Efficacy and safety of mesenchymal stem cells therapy in COVID-19 patients: a systematic review and meta-analysis of randomized controlled trials. - Lu, Wenming; Yan, Longxiang; Tang, Xingkun; Wang, Xuesong; Du, Jing; Zou, Zhengwei; Li, Lincai; Ye, Junsong; Zhou, Lin (Journal of Translational Medicine, 2024)