1. Department of Pneumology University Hospital Vienna AKH, Medical University of Vienna Vienna Austria
2. Department of Medicine V, Ludwig‐Maximilians‐University (LMU) of Munich Comprehensive Pneumology Center (CPC‐M) German Center for Lung Research (DZL) Munich Germany
3. Department of Internal Medicine II ‐ Pneumology University Hospital Bonn Bonn Germany
4. Evangelisches Krankenhaus Düsseldorf Children‘s Hospital Düsseldorf Germany
5. Department of Pediatrics, Research Institute Marien‐Hospital Wesel Wesel Germany
6. Hamburger Institut für Therapieforschung GmbH Hamburg Germany
7. Pneumologische Gemeinschaftspraxis und Studienzentrum KPPK Koblenz Germany
8. Ambulante Pneumologie mit Allergiezentrum Stuttgart Germany
9. Department of Pulmonary Medicine University Hospital Essen—Ruhrlandklinik Essen Germany
10. Kinderzentrum Bethel, Evangelisches Klinikum Bethel University Bielefeld Bielefeld Germany
11. Mainz University Hospital Pulmonary Department Mainz Germany
12. Thoraxklinik Heidelberg und IKF Pneumologie Mainz Mainz Germany