1. Department of Pediatrics Dr. von Hauner Children's Hospital, LMU University Hospital Munich München Germany
2. Université Libre de Bruxelles, Hôpital Universitaire des Enfants Reine Fabiola Brussels Belgium
3. Child and Adolescent Centre CUF Tejo Hospital Lisbon Portugal
4. Pediatrics Department, Gastroenterology Unit University Hospital Puerta de Hierro Majadahonda Madrid Spain
5. Pediatric Gastroenterology Kaplan Medical Centre Rehovot Israel
6. Faculty of Medicine Hebrew University of Jerusalem Jerusalem Israel
7. Pediatrics Department, Gastroenterology Unit University Hospital de Fuenlabrada Fuenlabrada, Madrid Spain
8. Department of Gastroenterology, Hepatology, and Nutrition University Children's Hospital, Faculty of Medicine, University of Ljubljana Ljubljana Slovenia
9. Saint Antoine Pediatric Clinic Saint Vincent de Paul Hospital, Groupement des Hôpitaux de l'Institut Catholique de Lille (GHICL), Catholic University Lille France
10. Division of Pediatrics, Pediatric Gastroenterology Department, Centro Materno Infantil do Norte ICBAS–Instituto de Ciências Biomédicas Abel Salazar Porto Portugal
11. Pediatric Gastroenterology Unit Hospital 12 de Octubre Madrid Spain
12. Referral Centre for Pediatric Gastroenterology and Nutrition Children's Hospital Zagreb, University of Zagreb School of Medicine Zagreb Croatia
13. Clinic of Children's Diseases of Vilnius University Faculty of Medicine Vilnius Lithuania
14. Department of Pediatrics, Gastroenterology and Nutrition School of Medicine Collegium Medicum University of Warmia and Mazury Olsztyn Poland