1. Division of Cardio-thoracic and Vascular Surgery, Klinikum Klagenfurt, Klagenfurt, Austria
2. University of Nis, Nis, Serbia
3. FH Joanneum, University of Applied Sciences, Graz, Austria
4. General, Visceral and Transplantation Surgery, Medical University Graz, Graz, Austria
5. Transplant Center Graz (TCG), Graz, Austria