Figure 3.

Frequency of nucleoside reverse transcriptase inhibitor and nonnucleoside reverse transcriptase inhibitor mutations by human immunodeficiency virus-1 RNA level, CD4 cell count, and clinical site. Abbreviations: Chiang Mai, Thailand (Chiang Mai University ACTG CRS); KCMC, Tanzania (Kilimanjaro Christian Medical Centre CRS); Kumuza, Malawi (Kamuzu Central Hospital, University of North Carolina Lilongwe CRS); NNRTI, nonnucleoside reverse transcriptase inhibitor; NRTI, nucleoside reverse transcriptase inhibitor; VL, human immunodeficiency virus-1 RNA level; Wits, South Africa (University of the Witwatersrand HIV CRS); YRG CARE, India (Y.R. Gaitonde Centre for AIDS Research and Education, VHS CRS).