Differential phenotype representation in live and apoptotic lymphocytes from HIV-infected children. Populations of live and apoptotic cells (as assessed by the TUNEL method) were examined for their expression of the indicated surface antigens. Data are presented as median with 25th and 75th percentile. Preferential selection of certain populations is indicated (*) and was calculated by comparing the percentage of a particular phenotype in the apoptotic population with the percentage in the viable population by the paired Student’st-test or the Wilcoxon Rank Sign test with P < .05 (*) considered significant.