Donor-recipient stem-cell source relationships, disease, and conditioning intensity. Proportions show 5-year eras in HCT date for donor type and stem-cell source (A); male recipients with female donors, children vs adult recipients, transplants performed for NMD, and myeloablative vs nonmyeloablative conditioning (B). BM, bone marrow; F, female; M, male; PB, peripheral blood.