1. Medical University Department of Medicine Kantonsspital Aarau Aarau Switzerland
2. Department of Pediatrics Kantonsspital Aarau Aarau Switzerland
3. Department of Clinical Research University Hospital Basel, University of Basel Basel Switzerland
4. Division of Gastroenterology, University Center for Gastrointestinal and Liver Diseases St. Clara Hospital and University Hospital Basel Switzerland
5. Department of Pediatric Endocrinology and Diabetology University Children's Hospital Basel Basel Switzerland