1. Department of Internal and Respiratory Medicine Krankenhaus Nord – Klinik Floridsdorf and Ludwig Boltzmann Institute for COPD and Respiratory Epidemiology Vienna Austria
2. Department of Medicine III Medical University of Vienna Vienna Austria
3. Center for Medical Statistics, Informatics, and Intelligent Systems Medical University of Vienna Vienna Austria
4. Department of Internal and Respiratory Medicine Wilhelminenspital Vienna Austria
5. Karl‐Landsteiner Institute for Respiratory Research and Pneumological Oncology Vienna Austria
6. Department of Respiratory Medicine and Ludwig Boltzmann Institute for COPD and Respiratory Epidemiology Otto‐Wagner‐Hospital and Sigmund Freud University, Medical School Vienna Austria
7. Department of Respiratory and Critical Care Medicine and Ludwig Boltzmann Institute for COPD and Respiratory Epidemiology Otto‐Wagner‐Hospital and Sigmund Freud University, Medical School Vienna Austria