Joseph H. Antin is Professor of Medicine at Harvard Medical School and Chief of the Stem Cell Transplant Program at the Dana-Farber/Brigham and Women's Cancer Center, Boston, MA, USA. Deborah Yolin Raley is the Director of the Physician Assistant Program and a practising Physician Assistant in the Hematopoietic Stem Cell Transplant Program at the Dana-Farber Cancer Institute, Boston, MA, USA.