1. Department of Pulmonology and Respiratory Medicine, Lung Center Stuttgart – Schillerhoehe Lung Clinic (affiliated to the Robert-Bosch-Hospital GmbH, Stuttgart), Auerbachstr. 110, 70376 Stuttgart, Germany
2. Department of Pulmonology and Respiratory Medicine, Lung Center Stuttgart – Schillerhoehe Lung Clinic (affiliated to the Robert-Bosch-Hospital GmbH, Stuttgart), Stuttgart, Germany
3. Department of Internal Medicine V, Ludwig-Maximilians-University (LMU) of Munich, Munich, Germany
4. Comprehensive Pneumology Center (CPC-M), Member of the German Center for Lung Research (DZL), Munich, Germany