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. 1998 Sep;5(5):662–666. doi: 10.1128/cdli.5.5.662-666.1998

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Copyright © 1998, American Society for Microbiology

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FIG. 1 — Percentages of CD4⁺ (a) or CD8⁺ (b) cells expressing different surface molecules in peripheral blood from HIV-negative controls in comparison with individuals with less than 2 years of HIV-1 infection and CD4⁺ counts of more than 500/μl (early infection), those with more than 8 years without symptoms and CD4⁺ counts above 500/μl (nonprogressors [NP]), and those who have progressed to AIDS (progressors [P]). The results are presented as box plots: the limits of the boxes represent the 25th and 75th percentiles. Additional symbols indicate the 10th and 90th percentiles (bars) and individual results (closed squares). Levels of significance of differences between adjacent groups as measured by the Mann-Whitney U test are indicated (ns, not significant). NP, LTNP.

FIG. 1 — Percentages of CD4⁺ (a) or CD8⁺ (b) cells expressing different surface molecules in peripheral blood from HIV-negative controls in comparison with individuals with less than 2 years of HIV-1 infection and CD4⁺ counts of more than 500/μl (early infection), those with more than 8 years without symptoms and CD4⁺ counts above 500/μl (nonprogressors [NP]), and those who have progressed to AIDS (progressors [P]). The results are presented as box plots: the limits of the boxes represent the 25th and 75th percentiles. Additional symbols indicate the 10th and 90th percentiles (bars) and individual results (closed squares). Levels of significance of differences between adjacent groups as measured by the Mann-Whitney U test are indicated (ns, not significant). NP, LTNP.