- Availability of suitable matched unrelated donor. We will require HLA matching at 9 of 10 loci including HLA A, B, C, DR and DQ. For patients treated at UCSF, typing will be done in the UCSF Immunogenetics Department. Typing will be done by high-resolution techniques at the allele level. Donors will be recruited through the National Marrow Donor Program (NMDP). Donors must meet the standards of NMDP as well as Institutional standards for donors at the center for which they are being collected.