1. Department of Cardiothoracic Surgery, Jena University Hospital, Jena, Germany
2. Department for Cardiac and Pediatric Cardiac Surgery, Heart Center Duisburg, Duisburg, Germany
3. Special Forces, Federal Police, Berlin, Germany
4. Institute for Conflict Research and Crisis Consulting, Munich, Germany
5. Press Office, German Society for Thoracic and Cardiovascular Surgery, Berlin, Germany