Affiliation: | (1) Institute of Occupational Medicine, Charit? School of Medicine, Free University and Humboldt University, Thielallee 69-73, 14195 Berlin, Germany;(2) Department of Respiratory Medicine, Hannover Medical School, Carl-Neuberg-Stra?e 1, 30625 Hannover, Germany;(3) Strategy Centre for Health, Health Care Campus North Rhine Westphalia, Universit?tsstra?e 136, 44799 Bochum, Germany;(4) Department of Cardiology and Pneumology, University Hospital G?ttingen, Germany |