Abdelmounem Eltayeib Abdo, et al. “ Prevalence of Hepatitis B Virus Among Blood Donors and Assessment of Blood Donor’s Knowledge about HBV in Sudan”. HIV/AIDS/Research/and/Treatment-Open/Journal, vol. 2, no. 3, Aug. 2015, pp. 76-80, https://openventio.us/index.php/HRT/article/view/1098.