Stephen J. Forman, MD Chair, Department of Hematology and Hematopoietic Cell Transplantation City of Hope Comprehensive Cancer Center Duarte, CA, USA Robert S. Negrin, MD Professor of Medicine Chief, Division of Blood and Marrow Transplantation Stanford University Stanford, CA, USA Joseph H. Antin, MD Professor of Medicine, Harvard Medical School Chief, Stem Cell Transplantation Dana-Farber/Brigham and Women »s Cancer Center Boston, MA, USA Frederick R. Appelbaum, MD Member and Director, Clinical Research Division Fred Hutchinson Cancer Research Center Professor and Head, Division of Medical Oncology University of Washington School of Medicine Seattle, WA, USA