Analysis of Risk Factors and Exploration of Predictors of Serious Cases of COVID-19 in Xi'an during the Period of 2021-2022
WANG Hai, WANG Zhuoli, PEI Honghong, PAN Longfei
Chinese General Practice . 2023, (17): 2132 -2137 .  DOI: 10.12114/j.issn.1007-9572.2022.0826