Antiretroviral Therapy, Highly ActiveHIV InfectionsAnti-HIV AgentsHIV Protease InhibitorsProtease InhibitorsAnti-Retroviral AgentsCD4 Lymphocyte CountViral LoadHIV-1Drug Resistance, ViralHIV ProteaseReverse Transcriptase InhibitorsAcquired Immunodeficiency SyndromeHIVRitonavirAIDS-Related Opportunistic InfectionsIndinavirSerine Proteinase InhibitorsLopinavirRNA, ViralNelfinavirZidovudineStavudineNevirapineBenzoxazinesDrug Therapy, CombinationHIV-Associated Lipodystrophy SyndromeSouth AfricaMedication AdherencePyrimidinonesCohort StudiesInfectious Disease Transmission, VerticalSaquinavirHIV SeropositivityViremiaDrug Resistance, Multiple, ViralImmune Reconstitution Inflammatory SyndromeCD4-Positive T-LymphocytesPatient ComplianceTreatment OutcomeLamivudineOrganophosphonatesTreatment FailureUgandaSerine EndopeptidasesPregnancy Complications, InfectiousPeptide HydrolasesAIDS Dementia ComplexMolecular Sequence DataSecretory Leukocyte Peptidase InhibitorBotswanaLymphoma, AIDS-RelatedCytomegalovirus RetinitisDidanosineEndopeptidasesAdenineHIV Reverse TranscriptaseTime FactorsLost to Follow-UpDrug MonitoringAmino Acid SequenceDrug Administration ScheduleOxazinesCarbamatesProspective StudiesProteinase Inhibitory Proteins, SecretoryCoinfectionTrypsin InhibitorsSerpinsLipodystrophyDideoxynucleosidesMalawiCysteine ProteasesDirectly Observed TherapyVirus ReplicationRetrospective StudiesAntiviral AgentsCysteine EndopeptidasesRisk FactorsCysteine Proteinase InhibitorsOligopeptidesMutationAfrica South of the SaharaProtease NexinsDisease ProgressionCote d'IvoireCross-Sectional StudiesAfrica, SouthernFollow-Up StudiesZambiaPlasmaHIV Wasting SyndromeTuberculosisAntitubercular AgentsPrevalencealpha 1-AntitrypsinCD4-CD8 RatioDrug InteractionsAprotininSarcoma, Kaposi