Percentage of cells expressing CD30 on specific lymphocyte subsets in responders and nonresponders. Comparison done by the Wilcoxon rank sum test. (A) Central memory CD8⁺CD45RO⁺CD62L⁺. (B) Central memory CD4⁺CD45RO⁺CD62L⁺. (C) Regulatory T cells (T-reg) CD4⁺CD25⁺CD127⁻.