Characterization and determinant factors of critical illness and in-hospital mortality of COVID-19 patients: A retrospective cohort of 1,792 patients in Kenya oleh Isinta M Elijah, Endawoke Amsalu, Xuening Jian, Mingyang Cao, Eric K Mibei, Danvas O Kerosi, Francis G Mwatsahu, Wei Wang, Faith Onyangore, Youxin Wang