1 Department of Internal Medicine, Universities of Gießen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Schubertstr. 81, 35392, Gießen, Germany.
2 Department of Internal Medicine, Universities of Gießen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Schubertstr. 81, 35392, Gießen, Germany. astrid.weiss@innere.med.uni-giessen.de.