Benefits of melatonin on mortality in severe-to-critical COVID-19 patients: A systematic review and meta-analysis of randomized controlled trials Jinlv Qin; Guizuo Wang; Dong Han;

Risk factors for bronchiectasis in patients with chronic obstructive pulmonary disease: a systematic review and meta-analysis XinXin Zhang; LiJian Pang; XiaoDong Lv; HaoYang Zhang;

Relationship between serum ferritin and the risk of all-cause death in patients with coronary artery disease Zhi-Hui Jiang; Ming-Ming Lyu; Yu-Juan Feng; Ting-Ting Wu; Ying Pan; Chang-Jiang Deng; Yi Yang; Xiao-Xia Guo; Ying-Ying Zheng; Xiang Xie;