1. Department of Pediatric Pneumology and Allergology University Hospital Schleswig‐Holstein Lübeck Germany
2. Airway Research Center North (ARCN) Lübeck and Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) Hannover Member of the German Center for Lung Research (DZL) Germany
3. University Medical Center Schleswig‐Holstein, Institute of Medica, Biometry and Statistics University of Lübeck Lübeck Germany
4. Department of Pediatric Pneumology, Allergology and Neonatology Hannover Medical School Hannover Germany
5. Department of Pediatric Radiology and Imaging Children's and Youth Hospital auf der Bult Hannover Germany
6. Department of Imaging and Interventional Radiology University Hospital Oldenburg Germany
7. Department of Pulmonary Medicine, German Centre for Lung Research Hannover Medical School Hannover Germany
8. Deptartment of Pulmonay Medicine Hannover Medical School, Hannover, Germany Hannover Germany
9. Department of Pediatric Pneumology and Allergology University Hospital Oldenburg Germany
10. Department of Pediatric Pneumology and Allergology University Hospital Dresden Germany
11. Department of Respiratory Medicine University Hospital Frankfurt Germany
12. Department of Pediatrics University Hospital Würzburg Germany
13. Department of Pediatrics, Inselspital University of Bern Bern Switzerland