Islam, M. S., 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”. Anaesthesia, Pain & Intensive Care, Vol. 25, no. 4, Aug. 2021, pp. 443–449, doi:10.35975/apic.v25i4.1553.