Department of Emergency Medicine;
Vituity;
Wichita;
KS 67214;
United States;
School of Medicine;
Faculty of Health Sciences;
Ben-Gurion University of the Negev;
Beer-Sheva 8414501;
Israel;
College of Osteopathic Medicine;
University of New England;
Biddeford;
ME 04005;
United States;
College of Medicine;
Sri Ramachandra Medical College and Research Institute;
Chennai 600116;
India;
Coronavirus; SARS-CoV-2; COVID-19; Mortality; Systematic review; Critical care;