Asad Hafeez, Hashmi, M., Ahmad, N., Hashmi, S. and Ismail, T. . (2026) “Association between ABO Blood Groups and Clinical Characteristics, Severity, and Outcomes of COVID-19 Patients”, Pakistan Journal of Chest Medicine, 32(1), pp. 33–39. Available at: https://www.pjcm.net/index.php/pjcm/article/view/1117 (Accessed: 22June2026).