Clinical Features and Prognostic Risk Factors of COVID-19 in Adults: a Retrospective Analysis of 93 Cases 
CAI Miaotian,LI Tongzeng,ZHANG Longyu,XU Hui,MOU Danlei,LIANG Lianchun
Chinese General Practice . 2021, (2): 196 -204 .  DOI: 10.12114/j.issn.1007-9572.2021.00.056