 Then, in 1907, Dr. Cabot hired Ida Maud Cannon (June 29, 1877 - July 7, 1960), who later held the title of Chief of Social Service (1914-1945) at the hospital.Together, Cabot and Cannon led the development and growth of the first social services department in a hospital in the United States.Cabot became chief of medicine at Massachusetts General Hospital from 1912 until his retirement, was an innovator in both medical education and psychosocial medicine.