1. Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School , Hannover, Germany
2. Department of Respiratory Medicine, Hannover Medical School , Hannover, Germany
3. Division of Thoracic Surgery, King Hussein Medical Center , Amman, Jordan
4. Department of Cardiac Surgery, University Hospital Heidelberg , Heidelberg, Germany
5. Department of Cardiac Surgery, University Hospital Düsseldorf , Düsseldorf, Germany
6. German Center for Lung Research (DZL/BREATH) , Hannover, Germany