- http://digestive.niddk.nih.gov -- National Digestive Diseases Information Clearinghouse
- www.gastro.org -- American Gastroenterological Association
- www.acg.gi.org -- American College of Gastroenterology
- www.liverfoundation.org -- American Liver Foundation
Review Date: 06/10/2010
Reviewed By: Reviewed by: Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.