1. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA;
2. National Marrow Donor Program, Minneapolis, MN;
3. Office of the Assistant Secretary for Preparedness and Response, Department of Health and Human Services, Washington, DC;
4. Adult Bone Marrow and Stem Cell Transplantation Program, Duke University Medical Center, Durham, NC;
5. Division of Allergy, Immunology, and Transplantation, National Institute of Allergy and Infectious Diseases, Bethesda, MD; and
6. Department of Medicine, University of Minnesota Blood and Marrow Transplant Program, Minneapolis, for the Radiation Injury Treatment Network