Okafor , IM, VO Abasi, HU Okoroiwu, and CO Ogar. “Pre- and Post-Donation Ferritin Level of Blood Donors Attending University of Calabar Teaching Hospital, Donor Clinic in Southern Nigeria”. The Nigerian Health Journal 23, no. 3 (October 8, 2023): 750–757. Accessed May 12, 2024. https://tnhjph.com/index.php/tnhj/article/view/717.