1. Comparison of CT imaging and clinical featuresbetween common and severe/critical type of COVID-19 patients;Zhao;Int J Med Radiol
2. Clinical characteristics of 463 patients with common and severe type coronavirus disease 2019;Cheng;Shanghai Med J
3. Clinical Characteristics of Coronavirus Disease 2019 in China;Guan;N Engl J
4. Clinical characteristics of fatal and recovered cases ofcoronavirus disease 2019 (COVID-19) in Wuhan, China: a retrospective study;Deng;Chin Med J
5. Meta-analysis of observational studies in epidemiology: a proposal for reporting;Stroup;JAMA,2000