1. Department of Paediatrics The Medical University of Warsaw Warsaw Poland
2. Institute of Gastroenterology, Nutrition and Liver Diseases, Schneider Children's Medical Center of Israel, Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel
3. Department of Clinical Sciences, Pediatrics Umeå University Umeå Sweden
4. Department of Translation Medical Science, Pediatric Section European Laboratory for the Investigation of Food Induced Disease (ELFID) University Federico II Naples Italy
5. Dr. von Hauner Children's Hospital, Department of Pediatrics University Hospital, LMU Munich Munich Germany
6. School of Medicine Collegium Medicum, Department of Pediatrics, Gastroenterology and Nutrition University of Warmia and Mazury Olsztyn Poland
7. Department of Pediatrics, Faculty of Medicine and Clinical Center University of Debrecen Debrecen Hungary
8. Celiac Disease Center Heim Pál National Paediatric Institute Budapest Hungary
9. Willem Alexander Children's Hospital Leiden University Medical Center Leiden The Netherlands
10. Pediatric Gastroenterology and Hepatology & Instituto de Investigacion Sanitaria La Fe University Hospital Valencia Spain