Edward Donnall Thomas (March 15, 1920 - October 20, 2012) was an American physician and director emeritus of the clinical research division at the Fred Hutchinson Cancer Research Center. While an undergraduate he met his wife, Dorothy (Dottie) Martin while she was training to be journalist. He entered Harvard Medical School in 1943, receiving an M.D. in 1946. Dottie became a lab technician during this time to support the family, and the pair worked closely thereafter. He did his residency at Peter Bent Brigham Hospital before joining the Army. In 1955, he was appointed physician in chief at the Mary Imogene Bassett Hospital where he began to study rodents that received lethal doses of radiation who were then saved by an infusion of marrow cells. At the time, patients who underwent bone marrow transplantation all died from infections or immune reactions that weren't seen in the rodent studies. In 1963, he moved his lab to the United States Public Health Service in Seattle. Thomas and Dottie developed bone marrow transplantation as a treatment for leukemia. In 1990 he shared the Nobel Prize in Physiology or Medicine with Joseph Murray for the development of cell and organ transplantation. He died of heart failure in 2012 at the age of 92. No photographer credited, undated.