Figure 1 Serum concentrations of fasting triglycerides (A), total cholesterol (B), and total bilirubin (C) during the four phases of different antiretroviral drug combinations, and total bilirubin serum concentration after restarting efavirenz in phase 4 (D). Drug combinations: phase 1: combivir (lamivudine/zidovudine) + lopinavir/ritonavir (ritonavir boosted lopinavir) + efavirenz; phase 2: combivir + atazanivir/ritonavir + efavirenz; phase 3: combivir + atazanivir/ritonavir; phase 4: combivir + atazanivir/ritonavir + efavirenz.