1. From the Dana–Farber Cancer Institute at St. Elizabeth’s Medical Center (C.I.C.), Blood Bank, Department of Pathology (R.M.K.), and the Division of Hematology (J.M.C.), Brigham and Women’s Hospital, and the Department of Medical Oncology, Dana–Farber Cancer Institute (E.P.A.) — all in Boston; and the Department of Hematology and Oncology, University Medical Center, Göttingen, Germany (C.I.C.).