DAVIDSOHN, ISRAEL (1895–1979), U.S. pathologist. Born in Tarnopol, Austria, Davidsohn qualified in Europe before immigrating to the United States in 1923. He became pathologist and director of laboratories at Philadelphia's Mount Sinai Hospital (1926–30). He then moved to Mount Sinai Hospital, Chicago, where he was director of experimental pathology. He also taught at Rush Medical College (1934–41) and the University of Illinois College of Medicine (1941–47) and from 1947 to 1968 was professor and chairman of the pathology department at the University of Chicago Medical School. His main field of research was immunohematology.