1. Division of Gastroenterology Hepatology and Nutrition Cincinnati Children's Hospital Medical Center Cincinnati OH
2. Stead Family Children's Hospital University of Iowa Iowa City IA
3. Department of Pediatrics Medical College of Wisconsin Milwaukee WI
4. Division of Gastroenterology, Hepatology and Nutrition Children's Healthcare of Atlanta Emory University School of Medicine Atlanta GA
5. Second Pediatric Clinic University Hospital St Marina Varna Bulgaria
6. Department of Gastroenterology, Hepatology and Nutrition Institute for Child and Youth Health Care of Vojvodina Medical Faculty University of Novi Sad Novi Sad Serbia
7. Department of Clinical Dietetics The Hospital for Sick Children Toronto Ontario Canada
8. Pediatric Gastroenterology Unit The Edmond and Lily Safra Children's Hospital The Haim Sheba Medical Center Ramat Gan Israel
9. Department of Pediatric Gastroenterology Academic Medical Centre Amsterdam The Netherlands
10. Pediatric Gastroenterology and Nutrition Ghent University Hospital Ghent Belgium
11. Department of Pediatric Gastroenterology & Metabolic Diseases Poznan University of Medical Sciences Poznan Poland
12. Pediatric Gastroenterology Hadassah Hebrew University Medical Center Jerusalem Israel
13. Division of Pediatric Gastroenterology and Nutrition Montreal Children's Hospital McGill University Health Centre Montreal Quebec Canada