O. S. Ashaka, E. A. Ademola, S. N. Usifoh, O. A. Akpoka, and A. A. Akinbami, “Hepatitis B surface antigen prevalence among people living with HIV in a tertiary hospital in Lagos, Nigeria”, J Infect Dev Ctries, vol. 20, no. 10, pp. 1532–1539, Oct. 2026.