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Elevated plasma HIV RNA by randomized assignment over time, represented by A, the frequency of HIV RNA 51–1000 and >1000 copies/mL at 6-monthly intervals, and B, the cumulative probability of virologic failure (HIV RNA >1000 copies/mL confirmed) up to 48 months. Abbreviation: EFV, efavirenz; LPV/r, ritonavir-boosted lopinavir; VL, viral load.
