FIGURE 2

Box-and-whisker plots on a logarithmic scale of PBMC mtDNA levels in healthy children and in HIV-exposed, uninfected children, according to exposure category and age. Upper and lower box borders represent the 75th and 25th percentiles, solid lines represent the median, dashed lines represent the mean, and error bars represent the 10th and 90th percentiles. aP < .001 versus controls; bP < .02 versus no ARV exposure group within same age category; cP < .001 versus no ARV exposure group within same age category. 3TC indicates lamivudine.