1. Department of Cardiovascular Surgery, Inselspital, University of Bern, Switzerland
2. Department of Vascular Surgery, Klinikum Neuperlach, Munich, Germany
3. Institute of Anatomy, Christian-Albrechts University of Kiel, Kiel, Germany
4. Division of Cardiothoracic Surgery, Cedars-Sinai Medical Canter, Los Angeles, CA, USA