Saigal S, Joshi A, Panda R, Goyal A, Kodamanchili S, Anand A, Brahmam D, Jha S, Pakhare A, Karna ST, Khurana A, Niwariya Y, Khadanga S, Sharma JP, Joshi R. Changing Critical Care Patterns and Associated Outcomes in Mechanically Ventilated Severe COVID-19 Patients in Different Time Periods: An Explanatory Study from Central India. Indian J Crit Care Med 2022; 26 (9):1022-1030.