1. Department for Child and Adolescent Health, University Clinic for Paediatrics III, Cystic Fibrosis Centre, Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Tyrol, Austria
2. Department for Child and Adolescent Health, University Clinic for Paediatrics III, Cystic Fibrosis Centre, Medical University of Innsbruck, Innsbruck, Austria
3. Department of General Pediatrics and Neonatology, University Hospital of Giessen and Marburg, Campus Giessen, Giessen, Germany