The American Gastroenterological Association: history of its first seventy-five years.
D001363:Awards and Prizes / Q000266:history*; D005762:Gastroenterology / Q000193:education / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D011643:Publishing; D012958:Societies, Scientific / Q000266:history*; D014481:United States