Fig. 1.
The percentage of total perforin positive cells (mean ± standard error [SE]) in CB lymphocytes (A, ▨;) and PBL from children (B, ▤), men (C, □), women (D, ▪), and elderly persons (E, ▥). Levels of significance: (B, C, D) versus (A, E) P < .001; (A) versus (E) P < .05; (B) versus (C, D) P < .05.