1. Department of Pneumology and Critical Care Medicine University of Rostock Rostock Germany
2. Department of Respiratory Medicine Hannover Medical School Hannover Germany
3. IKF Pneumologie, Mainz, Germany and Department of Pneumology and Respiratory Care Medicine University of Heidelberg Heidelberg Germany
4. Institute of Allergology, Charité, Universitätsmedizin Berlin and Fraunhofer Institute for Translational Medicine and Pharmacology, Allergology and Immunology Berlin Germany
5. Department of Pneumonology University Hospital, Otto‐Von‐Guericke‐University Magdeburg Germany
6. University Hospital Schleswig‐Holstein Campus Kiel, Internal Medicine Department I Kiel Germany
7. LungenClinic Grosshansdorf, Grosshansdorf, Germany and University Hospital Schleswig‐Holstein‐Campus Kiel Department for Internal Medicine I Kiel Germany
8. Pulmonary Department Mainz University Hospital Mainz Germany
9. Department of Medicine V University Hospital LMU Munich, and Helmholtz Center Munich Munich Germany