AGA American Gastroenterological Association
ASGE American Society for Gastrointestinal Endoscopy
ACG American College of Gastroenterology
FDA U.S. Food and Drug Association
NCI U.S. National Cancer Institute
CDC U.S. Center for Disease Control and Prevention
ACR American College of Radiology
AASLD American Association for the study of the liver
WHO:
IARC International Agency for Research on Cancer