Jejunoileal BypassHyperlipidemiasAntiretroviral Therapy, Highly ActiveAnti-HIV AgentsHIV InfectionsAnti-Retroviral AgentsCD4 Lymphocyte CountLiver DiseasesViral LoadHIV-1LiverLiver TransplantationLiver NeoplasmsLiver CirrhosisDrug Resistance, ViralReverse Transcriptase InhibitorsHIVHIV Protease InhibitorsMicrosomes, LiverAcquired Immunodeficiency SyndromeLiver RegenerationFatty LiverZidovudineNevirapineMedication AdherenceSouth AfricaInfectious Disease Transmission, VerticalBenzoxazinesAIDS-Related Opportunistic InfectionsStavudineRNA, ViralDrug-Induced Liver InjuryLiver Function TestsDrug Therapy, CombinationRitonavirOrganophosphonatesMitochondria, LiverCohort Studies