1. UZ Brussel, KidZ Health Castle, Vrije Universiteit Brussel (VUB), 1090 Brussels, Belgium
2. Department Paediatrics, Imperial College London, London SW7 2BX, UK
3. Department Dietetics, Winchester University, Winchester SO23 4NR, UK
4. Department Medicine, KU Leuven, 3001 Leuven, Belgium
5. Department of Pediatrics, NYU Grossman School of Medicine, Hassenfeld Children’s Hospital, New York, NY 10016, USA
6. Department of Pediatrics, Gastroenterology and Nutrition, Collegium Medicum, University of Warmia and Mazury, 10-719 Olsztyn, Poland
7. Department of Pediatrics, Hospital “F. Del Ponte”, University of Insubria, 21100 Varese, Italy
8. Section of Pediatric Allergy and Immunology, Children’s Hospital Colorado, University of Colorado, Aurora, CO 80045, USA
9. Center for Pediatric Gastroenterology, Hospital Pequeno Príncipe, Curitiba 80250, Brazil