Dose-Response Relationship, DrugTime FactorsViral LoadAnti-HIV AgentsHIV InfectionsRibavirinCD4 Lymphocyte CountDrug Resistance, ViralDrug Therapy, CombinationAntiviral AgentsAntiretroviral Therapy, Highly ActiveHIV-1Treatment FailurePolyethylene GlycolsRNA, ViralHIV Protease InhibitorsRitonavirInterferon-alphaTreatment OutcomeDose-Response Relationship, RadiationHepatitis C, ChronicBenzoxazinesOxytropisReverse Transcriptase InhibitorsLopinavirLamivudineAnti-Retroviral AgentsNevirapine