NevirapineAnti-HIV AgentsReverse Transcriptase InhibitorsInfectious Disease Transmission, VerticalBenzoxazinesHIV InfectionsZidovudineStavudinePregnancy Complications, InfectiousHIV-1Drug Resistance, ViralLamivudinePlasmaHIV Reverse TranscriptaseLopinavirOxazinesViral LoadAntiretroviral Therapy, Highly ActiveOxidoreductases, N-DemethylatingAnti-Retroviral AgentsPyrimidinonesCD4 Lymphocyte CountUgandaExanthemaDrug Therapy, CombinationRitonavirPregnancyBurundiZambiaTreatment FailureDelavirdineBotswanaDrug EruptionsMalawiMilk, HumanRNA, ViralBreast FeedingDried Blood Spot TestingInfant, NewbornHIV Protease InhibitorsOrganophosphonatesSouth AfricaDrug InteractionsAryl Hydrocarbon HydroxylasesHIVIndinavirCote d'IvoireNelfinavirDidanosineDrug-Induced Liver InjuryLigase Chain ReactionAdenine