Pervaiz, Aslam, et al. “PRE-DONATION SCREENING OF VOLUNTEER PRISONER BLOOD DONORS FOR HEPATITIS B & C IN PRISONS OF PUNJAB, PAKISTAN”. Journal of Ayub Medical College Abbottabad, vol. 27, no. 4, Dec. 2015, pp. 794-7, https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/468.