American College of Gastroenterology
Information for physicians and patients on a variety of gastrointestinal topics.
American Gastroenterological Association
Resource for patients and physicians. Information about digestive diseases, MEDLINE access, physician locator service, meeting information for physicians, practice guidelines, and more.
American Society for Gastrointestinal Endoscopy
News for gastrointestinal endoscopists, case study of the month, meetings, publications.