sentences:  Although not ordered to take part, psychiatrists and many psychiatric institutions were involved in the planning and carrying out of "Aktion T4".In August 1941, after protests from Germany's Catholic and Protestant churches, Hitler cancelled the T4 program, although the handicapped continued to be killed until the end of the war.The medical community regularly received bodies for research; for example, the University of Tübingen received 1,077 bodies from executions between 1933 and 1945.