CD30 expression on memory CD8⁺ T-cell subsets. Values along the y-axis are percentage of cells in each subset that express CD30. Median and ranges are displayed in Table 2. (A) Effector memory CD8⁺ T cells, (B) central memory CD8⁺ T cells, and (C) representative histograms gated on CD8⁺CD62L⁻ analyzing CD30 expression in effector memory CD8⁺ T cells by flow cytometry in 2 patients without (NONE) and 2 patients with aGVHD. Percentages reported are the percent CD30⁺ within CD8⁺CD45RO⁺CD62L⁻.