Noor, Afshan, Sunila Tashfeen, Fahim Akhtar, Nimra Anwar, Hafeen Din, and Farhan Akhtar. “ASSOCIATION OF COVID-19 WITH ABO BLOOD GROUPS IN TERTIARY CARE CENTER OF PAKISTAN”. PAFMJ 70, no. 1 (July 30, 2020): S251-55. Accessed August 7, 2022. https://mail.pafmj.org/index.php/PAFMJ/article/view/4884.