Ugwu , A. O., and C. C. Efobi. “Transfusion Services in Nigeria: Blood Banking Techniques and Availability of Facilities for Blood Component Therapy”. Nigerian Journal of Haematology, vol. 6, no. 1&2, Aug. 2022, pp. 19-26, https://njhaem.org.ng/index.php/home/article/view/61.