Clinical Characteristics of COVID-19 Deaths in Wuhan:an Analysis of 2 231 Cases 
CHENG Leiqun,JIANG Ming,ZHAO Liang,SHEN Xiaoling,ZHENG Ying,DING Jing,LIU Yaxiong,XU Yongzhe
Chinese General Practice . 2020, (35): 4412 -4418 .  DOI: 10.12114/j.issn.1007-9572.2020.00.589