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Subpopulations of lymphocytes in plaques at day 0 and day 19 of culture. The fractions of CD4+CD8− T cells and CD4−CD8+ T cells at day 0 (green) and day 19 (brown) of culture, as determined from flow cytometry. Medians and IQR for plaques from 4 donors cultured for 19 days are presented.
