V. J. . Ifeoma, O. O. Sunday, A. U. Maxwell, and A. A. Asindi, “HIV Sero-Prevalence among Infants Attending Immunization Centers in Calabar Metropolis, Cross River State, Southern, Nigeria”, Int. J. Child Health Nutr., vol. 5, no. 3, pp. 121–125, Sep. 2016.