1. Department of Cellular and Molecular Medicine, The Panum Institute, University of Copenhagen, Denmark
2. Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna
3. Abteilung Allgemeine Pädiatrie und Neonatologie, Zentrum für Kinderheilkunde und Jugendmedizin, Justus-Liebig-Universität, Gießen, Germany
4. Department of Pediatric Gastroenterology, WKZ/ UMC Utrecht, Utrecht, The Netherlands
5. Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
6. Gesundheit Nord gGmbH, Klinikverbund Bremen, Klinik für Kinder und Jugendmedizin, Professor-Hess-Kinderklinik, Klinikum Bremen-Mitte, Bremen, Germany
7. Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
8. Division of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria