1 Department of Cardiac Surgery, Paracelsus Medical University Nuremberg, Nuremberg, Germany; Medical School, University of Ljubljana, Ljubljana, Slovenia. Electronic address: [email protected].
2 Department of Cardiac Surgery, Medical University of Innsbruck, Innsbruck, Austria; Department of Cardiothoracic and Vascular Surgery, Klinikum KABEG, Medical University of Graz affiliated Clinic, Klagenfurt am Woerther See, Austria.