1. The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins Hospital, Baltimore, MD;
2. Division of Biostatistics, Institute for Health and Society, and
3. The Center for International Blood and Marrow Transplant Research, Department of Medicine, Medical College of Wisconsin, Milwaukee, WI;
4. Department of Hematology & Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA;
5. The Blood and Marrow Transplant Program at Northside Hospital, Atlanta, GA;
6. Thomas Jefferson University Hospital, Inc., Philadelphia, PA;
7. Division of Hematology and Oncology, Department of Medicine, University of Florida, Gainsville, FL;
8. Adult Bone Marrow Transplantation Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY;
9. Division of Hematology and Oncology, Department of Medicine, Columbia University, New York, NY;
10. Churchill Hospital, Oxford, United Kingdom;
11. Barnes Jewish Hospital, St. Louis, MO;
12. Hospital Clinic, University of Barcelona, Institute of Research Josep Carreras, Barcelona, Spain; and
13. Department of Hematology and Medical Oncology, Winship Cancer Institute, Atlanta, GA