NelfinavirHIV Protease InhibitorsSaquinavirOxazinesRitonavirBiological MarkersIndinavirBenzoxazinesStavudineAnti-HIV AgentsHIV InfectionsPyrimidinonesReverse Transcriptase InhibitorsLopinavirHIV ProteaseHIV-1CarbamatesArea Under CurveDrug InteractionsDibenzocycloheptenesAspartic Acid ProteasesTumor Markers, BiologicalLamivudineDrug Therapy, CombinationDrug Resistance, ViralCytochrome P-450 CYP3A