1 Dept of Pneumology, Hannover Medical School, Member of the German Center for Lung Research (DZL), Hannover, Germany olsson.karen@mh-hannover.de.
2 Dept of Pneumology, Kerckhoff Heart, Rheuma and Thoracic Center, Bad Nauheim, Germany.
3 Dept of Internal Medicine, Justus Liebig University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany.
4 Dept of Pneumology, Hannover Medical School, Member of the German Center for Lung Research (DZL), Hannover, Germany.
5 Dept of Internal Medicine, Ernst-Moritz-Arndt University, Greifswald, Germany.