American Association for the Study of Liver Diseases

American Cancer Society

American College of Gastroenterology

American Gastroenterological Association

American Liver Foundation

American Society for Gastrointestinal Endoscopy

Armed Forces Institute of Pathology Division of Gastrointestinal Pathology

Centers for Disease Control

Crohn's and Colitis Foundation of American

Digestive Disease Week

Greenson's Gastrointestinal and Liver Pathology

Food and Drug Administration

Gastrointestinal Pathology from WebPath

Hepatic Pathology from WebPath

Medscape

Morbidity and Mortality Weekly Report

National Institute of Diabetes and Digestive and Kidney Disease

National Institutes of Health

New England Journal of Medicine

New York Society for Gastrointestinal Endoscopy