1. Department of Internal and Respiratory Medicine Krankenhaus Nord – Klinik Floridsdorf Vienna Austria
2. Karl‐Landsteiner‐Institute for Lung Research and Pulmonary Oncology Vienna Austria
3. Ludwig‐Boltzmann Institute for COPD and Respiratory Epidemiology Vienna Austria
4. Medical University of Vienna Vienna Austria
5. Medical School Sigmund Freud University Vienna Austria
6. Department of Internal and Respiratory Medicine Wilhelminenspital Vienna Austria