Al-Barznjy, N. H., and K. S. Ali. “Prevalence of Hepatitis B Core Antibodies and Occult Hepatitis B Infection Among Blood Donors in Erbil Governorate, Iraq”. UHD Journal of Science and Technology, vol. 9, no. 2, July 2025, pp. 1-6, doi:10.21928/uhdjst.v9n2y2025.pp1-6.