ZidovudineAnti-HIV AgentsDidanosineStavudineLamivudineReverse Transcriptase InhibitorsHIV InfectionsZalcitabineInfectious Disease Transmission, VerticalHIV-1NevirapineDideoxynucleotidesDideoxynucleosidesAcquired Immunodeficiency SyndromeAIDS-Related ComplexDrug Therapy, CombinationHIV Reverse TranscriptasePregnancy Complications, InfectiousIndinavirCD4 Lymphocyte CountDelivery of Health CareHealth PersonnelHIV Core Protein p24Drug Resistance, ViralBenzoxazinesThymine NucleotidesViral LoadRNA, ViralAntiviral AgentsDrug InteractionsAntiretroviral Therapy, Highly ActiveOxazinesOrganophosphonatesPregnancyHIV Protease InhibitorsBotswanaHealthcare DisparitiesHealth Care CostsUnited StatesDrug Resistance, Multiple, ViralDrug Resistance, MicrobialUnited States Agency for Healthcare Research and QualityHIVAnti-Retroviral AgentsInfant, NewbornNelfinavirDouble-Blind MethodAdenineLopinavirRNA-Directed DNA PolymeraseAppetite StimulantsHIV SeropositivityDrug Administration ScheduleHealth Services AccessibilitySaquinavirHalf-LifePyrimidinonesHealth ServicesThymidine MonophosphateNucleosidesTreatment OutcomeQuality of Health CareAttitude of Health PersonnelRitonavirRetrospective StudiesLeukocyte CountQuestionnairesCost-Benefit AnalysisTreatment FailureAIDS Dementia ComplexTime FactorsHealthcare Financing