1. Pediatric Pulmonology and Sleep Medicine, Cystic Fibrosis Center,
University Hospital Essen, Essen, Germany
2. Department of Pediatric Respiratory Medicine, Immunology and Critical
Care Medicine, Charite University Hospital Berlin, Berlin, Germany
3. Division of Pediatric Surgery, Department of General, Abdominal and
Transplant Surgery, University Hospital Essen, Essen, Germany
4. Department of Pediatric Pneumology and Allergy, University Hospital
Regensburg, Regensburg, Germany
5. Department of Pediatrics, Vest Children's Hospital Datteln,
Datteln, Germany
6. Center for Pediatrics, Department of Neonatology, Medical Center,
University of Freiburg, Freiburg im Breisgau, Germany