High-dose Intravenous Gamma Globulin in the Treatment of Severe Viral Pneumonia in Adults:a Meta-analysis 
LONG Sidan,JI Shuangshuang,ZHOU Yuanchen,YAO Shukun
Chinese General Practice . 2021, (2): 225 -231 .  DOI: 10.12114/j.issn.1007-9572.2020.00.628