Celiac disease -
Children’s Digestive Health and Nutrition Foundation
National Digestive Diseases Information Clearinghouse
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
American Dietetic Association
Celiac Disease Foundation
Celiac Sprue Association
Gluten Intolerance Group
National Foundation for Celiac Awareness
American Gastroenterological Association

Chronic Abdominal Pain -
Healthy Children
The American College of Gastroenterology
American Gastroenterological Association
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Constipation and encopresis -
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
American Gastroenterological Association
International Foundation for Functional Gastrointestinal Disorders
IFFGD About Kids GI
National Digestive Diseases Information Clearinghouse

Chronic Diarrhea -
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
American Gastroenterological Association
National Digestive Diseases Information Clearinghouse

Cystic fibrosis -
Cystic Fibrosis Foundation
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Dysphasia -

Esophageal disease -
Children’s Digestive Health and Nutrition Foundation
National Digestive Diseases Information Clearinghouse
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Failure to thrive -
American Academy of Pediatrics
American Dietetic Association
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Gallstones -
American Gastroenterological Association
National Digestive Diseases Information Clearinghouse

Gastroesophageal reflux disease -
Children’s Digestive Health and Nutrition Foundation
National Digestive Diseases Information Clearinghouse

Helicobacter pylori -
National Digestive Diseases Information Clearinghouse
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Hepatitis -
American Gastroenterological Association
American Liver Foundation
Hepatitis Foundation International
National Digestive Diseases Information Clearinghouse

Inflammatory bowel disease -
Children’s Digestive Health and Nutrition Foundation
Crohn’s and Colitis Foundation of America

Irritable bowel syndrome -
National Digestive Diseases Information Clearinghouse

Lactose intolerance -
American Gastroenterological Association
National Digestive Diseases Information Clearinghouse
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Liver disease -
American Gastroenterological Association
American Liver Foundation
National Digestive Diseases Information Clearinghouse

Milk allergy -
American Dietetic Association
National Agriculture Library

Miscellaneous Diseases A to Z -
GastroKids 

Nutritional Disorders -
American Academy of Pediatrics
American Dietetic Association
National Agriculture Library

Obesity -
National Agriculture Library
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Pancreatic disease -
American Gastroenterological Association
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Polyps -
American Gastroenterological Association
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Rectal bleeding -
American Gastroenterological Association
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

Vomiting -
American Gastroenterological Association
National Digestive Diseases Information Clearinghouse
Cyclic Vomiting Syndrome Association