1. Department of Thoracic Surgery, Center for Pneumology and Thoracic Surgery, Schillerhoehe Hospital, Teaching Hospital of the University of Tuebingen, Gerlingen, Germany
2. Institute of Pathology, Hannover Medical School, Hannover, Germany
3. Department of Cardiac and Thoracic Surgery, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
4. Fördergemeinschaft für innovative Medizin, Beichlingen, Germany