Anti-HIV AgentsHIV InfectionsCD4 Lymphocyte CountAntiretroviral Therapy, Highly ActiveAnti-Retroviral AgentsViral LoadHIV-1Reverse Transcriptase InhibitorsHIVAcquired Immunodeficiency SyndromeDrug Resistance, ViralHIV Protease InhibitorsAIDS-Related Opportunistic InfectionsDrug Therapy, CombinationMedication AdherenceSouth AfricaRNA, ViralCohort StudiesStavudineZidovudineNevirapinePatient ComplianceBenzoxazinesTreatment OutcomeInfectious Disease Transmission, VerticalHIV-Associated Lipodystrophy SyndromeRitonavirHIV SeropositivityImmune Reconstitution Inflammatory SyndromeUgandaViremiaLopinavirLamivudineOrganophosphonatesTreatment FailureCD4-Positive T-LymphocytesDrug Administration ScheduleDrug MonitoringPregnancy Complications, InfectiousIndinavirLost to Follow-UpProspective StudiesDrug Resistance, Multiple, ViralAIDS Dementia ComplexRetrospective StudiesRisk FactorsBotswanaMalawiAdenineTime FactorsPyrimidinonesDidanosineCoinfectionLymphoma, AIDS-RelatedNelfinavirDirectly Observed TherapyHIV Reverse TranscriptaseFollow-Up StudiesCross-Sectional StudiesDrug InteractionsZambiaAfrica South of the SaharaDideoxynucleosidesCote d'IvoireCytomegalovirus RetinitisAfrica, SouthernPrevalenceDisease ProgressionIncidenceLipodystrophyOxazinesTuberculosisHIV Wasting SyndromeHIV ProteaseDouble-Blind MethodAntitubercular AgentsDeveloping CountriesZimbabwePlasmaVirus ReplicationMultivariate AnalysisAIDS-Associated NephropathyLongitudinal StudiesCD4-CD8 RatioSaquinavirPregnancyHIV Long-Term SurvivorsCD8-Positive T-LymphocytesHaitiCameroonGenotypeUnited StatesTreatment RefusalProportional Hazards ModelsAntiviral AgentsLogistic Modelspol Gene Products, Human Immunodeficiency VirusAcidosis, LacticThailandWithholding Treatment