“ABO Blood Group Status and Von Willebrand Factor Antigen Levels in a Cohort of 100 Blood Donors in an African Population”. International Journal of Biomedical Research 7, no. 4 (April 30, 2016): 219–222. Accessed March 31, 2026. https://ssjournals.co.in/index.php/ijbr/article/view/3147.