William Beaumont, Robley Dunglison, and the 'Philadelphia Physiologists'.
D005060:Europe; D005750:Gastric Juice; D005762:Gastroenterology / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D010414:Pennsylvania; D010827:Physiology / Q000266:history*; D013270:Stomach / Q000502:physiology; D014481:United States