1. Department of Thoracic Surgery University Center for Thoracic Diseases, University Medical Center Mainz, Johannes Gutenberg University Mainz Mainz Germany
2. Department of Thoracic Surgery ViDia Kliniken Karlsruhe Karlsruhe Germany
3. Clinic for Thoracic Surgery Clinical Center Belgrade Serbia
4. Department for Cardiac and Vascular Surgery University Medical Center Mainz, Johannes Gutenberg University Mainz Mainz Germany