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