Plasma HIV-1 geno- typing (codons 1 through 99 of protease and codons 1 through 350 of reverse transcriptase) was performed, with the use of the ViroSeq HIV-1 Genotyping System, version 2.0 (Celera), in pa- tients who underwent seroconversion and who had plasma HIV-1 RNA levels of 200 copies per milliliter or higher.