Nadeem, Amina, et al. “DEMOGRAPHIC FEATURES OF DONORS AND CAUSES OF BLOOD DONOR DEFERRAL AT ARMED FORCES INSTITUTE OF TRANSFUSION, RAWALPINDI: Blood Donor Selection And Deferral Pattern”. Pakistan Armed Forces Medical Journal, vol. 66, no. 6, Dec. 2016, pp. 898-02, https://pafmj.org/PAFMJ/article/view/1280.