Hanif, S., Sohaib, M., Talha, S. and Rayani, A. (2023) “Frequency of extra pulmonary complications in critically ill COVID-19 patients and their association with inflammatory markers and hypoxia: Retrospective analysis at a tertiary care hospital in Karachi, Pakistan”, Pakistan Journal of Medical Sciences, 39(6). doi: 10.12669/pjms.39.6.7380.