M. S. Islam, D. Bhowmick, M. Parveen, M. M. Kamal, and A. AKM, “Case fatality rate and survival functions of severe COVID–19 patients in intensive care unit of Bangabandhu Sheikh Mujib Medical University in Bangladesh: an observational study”, apic, vol. 25, no. 4, pp. 443–449, Aug. 2021.