Sindhu Rehman, Sobia Ashraf, Shahid Mehmood, Hafsa Malik, Rahat Serferaz, and Saeed Ahmed, “Frequency of Leukoerythroblastic Picture and Hematological Parameters in COVID-19 Patients and Association With Disease Severity”, Proceedings S.Z.M.C, vol. 36, no. 1, pp. 8–13, Feb. 2022.