- DONOR: Human leukocyte antigen (HLA) matched unrelated donor; donors should be matched for HLA -A, -B, -C, -developmentally regulated ribonucleic acid (RNA) binding protein 1(DRB)1 and -class II, DQ beta 1 (DQB) 1; HLA -A and -B loci should be matched at least to the level of resolution; HLA -C, -DRB1, and -DQB1 should be typed at the highest level of resolution available at the time of donor selection; donor must consent to either a bone marrow harvest or PBSC mobilization with filgrastim (G-CSF) arranged through the National Marrow Donor Program (NMDP) or other donor centers