1. Department of Gastroenterology and Hepatology University Hospital Zurich Zurich Switzerland
2. Allergy and Asthma Consultant Indianapolis IN USA
3. Children's Hospital Colorado Anschutz Medical Campus Aurora Aurora CO USA
4. Mount Sinai Center for Eosinophilic Disorders Icahn School of Medicine at Mount Sinai New York NY USA
5. Divison of Gastroenterology and Hepatology University of North Carolina School of Medicine Chapel Hill NC USA
6. Digestive Health Institute Children's Hospital Colorado Gastrointestinal Eosinophilic Diseases Program University of Colorado School of Medicine Aurora CO USA
7. Feinberg School of Medicine Nothwestern University Chicago IL USA
8. Department of Pediatrics University of Illinois Peoria IL USA
9. Division of Gastroenterology and Hepatology Mayo Clinic Rochester MN USA
10. Department of Gastroenterology Academic Medical Center Amsterdam The Netherlands
11. Institute of Social and Preventive Medicine University of Bern Bern Switzerland
12. Department of Gastroenterology and Hepatology Centre Hospitalier Universitaire Vaudois and University of Lausanne Lausanne Switzerland
13. Department of Dermatology University Hospital Inselspital Bern Bern Switzerland
14. Institute of Pharmacology University of Bern Bern Switzerland
15. Department of Clinical Immunology and Allergology Sechenov University Moscow Russia