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RANTES secretion levels in serum (A) and culture supernatants of PHA-stimulated CD4+ enriched lymphocytes (B) obtained from 37 uninfected individuals. The symbols +/+ and +/− denote homozygote and heterozygote for haplotype III, respectively, and −/− denotes those lacking haplotype III. Horizontal lines indicate the mean levels. Statistical significance for difference is indicated.
