1. National Marrow Donor Program, Minneapolis, MN;
2. Europdonor Foundation, Leiden, The Netherlands;
3. The Transplantation Society, Centre for Transplant and Renal Research, Westmead Hospital, University of Sydney, Sydney, Australia;
4. DKMS German Bone Marrow Donor Center, Tuebingen, Germany;
5. Department of Haematology, Anthony Nolan Trust, UCL Cancer Centre, London, United Kingdom;
6. Royal Marsden Hospital, Sutton, United Kingdom;
7. Department of Medicine, Psychiatry, and Clinical Translational Science, University of Pittsburgh, Veterans Health Administration Pittsburgh Healthcare System, Pittsburgh, PA;
8. Buddhist Tzu Chi Marrow Donor Registry, Hualien, Taiwan; and
9. Norwegian Bone Marrow Donor Registry, Institute of Immunology, Oslo University Hospital Rikshospitalet, Oslo, Norway