1. Rigshospitalet, Pediatric Nutrition Unit Copenhagen University HospitalRigshospitalet Copenhagen Denmark
2. Rigshospitalet, CF Center CopenhagenDepartment of Pediatrics and Adolescent Medicine Copenhagen Denmark
3. Department of Nutrition, Exercise and Sports University of Copenhagen Copenhagen Denmark
4. Jena University Hospital Jena Thüringen Germany
5. Cystic Fibrosis Center Brandenburg Medical School (MHB) University Brandenburg an der Havel Germany
6. Faculty of Health Sciences Joint Faculty of the Brandenburg University of Technology Cottbus –Senftenberg The Brandenburg Medical School Theodor FontaneUniversity of Potsdam, Cottbus Brandenburg an der Havel and Potsdam Germany