Donor CD3⁺chimerism by day +90. Box-and-whisker plots indicate peak donor CD3⁺ chimerism by day +90 for the 72 patients with (A-B) HLA-MMUDs and (C-D)193 patients with HLA-MUDs. Data are stratified by relapse status (upper panels) and by underlying disease (bottom panels). The dark horizontal line indicates the median, box indicates the interquartile range, and whiskers indicate the range. P values were calculated by using Fisher’s exact test.