Fellow Royal College Surgeons, American Association for the Advancement of Science, Institute Society, Ethics and Life Sciences (honorary). Member International Society for Research in Anesthesia and Analgesia, American Medical Association (member therapeutic trials committee, 1949-1950, council on pharmacy and chemistry 1949, commission on medical research 1950-1976), American Society Pharmacology and Experimental Therapeutics, Society Clinical Investigation, American Society Anesthesiology, Massachusetts Medical Society, New York Academy Science (life. Member), Royal Society Medicine London, honorary, Argentina Society for Thoracic Surgery (honorary.
Member), American Academy Arts and Sciences, Association Anaesthetists of Great Britain and Ireland (correspondent fellow), Sociedad Nacional de Anestesiologic (foreign correspondent. Member), Swedish Society Anesthesiologists (honorary), Association University Anesthetists, American Surgical Association, Sigma Xi, Alpha Omega Alpha.