| clinnutr.org | The American Society for Parenteral and Enteral Nutrition |
| bsg.org.uk | British Society of Gastroenterology |
| gi.org | American College of Gastroenterology |
| aasld.org | American Association for the Study of Liver Diseases (AASLD) |
| nih.gov | National Institutes of Health |
| abim.org | American Board of Internal Medicine |
| sages.org | Society of American Gastrointestinal Endoscopic Surgeons |
| nih.gov | National Institute of Diabetes and Digestive and Kidney Diseases |
| liverfoundation.org | American Liver Foundation |
| gastro.org | The American Gastroenterological Association |
| gastro.org | www.gastro.org/ |
224364
, ,