Akani, C., O. Erhabor, H. Opurum, O. Ejele, and C. Nwauche. “HIV Sero-Discordance Among Nigerian Couples: Challenges and Controversies”. Nigerian Medical Practitioner, vol. 48, no. 3, Jan. 2006, pp. 62-66, doi:10.4314/nmp.v48i3.28766.