Alyaa A. Hafedh et al. 2019. The frequency of Anti-hepatitis B core antibody in Negative Hepatitis B surface Antigen Blood Donors in Thi-Qar province. University of Thi-Qar Journal. 10, 3 (Apr. 2019), 1–5. DOI:https://doi.org/10.32792/utj.v10i3.29.