1. Department of Pediatrics, Landeskrankenhaus Bregenz, 6900 Bregenz, Austria
2. Department of Psychosomatics and Psychiatry, University Children’s Hospital, University of Zurich, 8032 Zurich, Switzerland
3. Division of Child and Adolescent Health Psychology, Department of Psychology, University of Zurich, 8050 Zurich, Switzerland
4. Children’s Research Centre, University Children’s Hospital Zurich, University of Zurich, 8032 Zurich, Switzerland
5. University Research Priority Program “ITINERARE—Innovative Therapies in Rare Diseases”, University of Zurich, 8032 Zurich, Switzerland
6. Department of Pediatrics, Vestfold Hospital Trust, NO-3168 Tønsberg, Norway
7. Division of Metabolism and Children’s Research Center, University Children’s Hospital Zurich, University of Zurich, 8032 Zurich, Switzerland
8. Vorarlberg University of Applied Sciences, Competence Area Healthcare and Nursing, 6850 Dornbirn, Austria