Dr. Colin Sieff received his MB.BCh. from the University of the Witwaterswand, Johannesburg, South Africa, in 1968. He trained in hematology at The Royal Marsden, St. George's Hospital and The Royal Free Hospital, and in pediatric hematology at the Hospital for Sick Children in London. He was named Claudia Adams Barr Program Investigator in Innovative Basic Cancer Research at Dana-Farber Cancer Institute in 1999. He directs the bone marrow failure program.