1. Department of Thoracic and Vascular Surgery, University Hospital Antwerp, Drie Eikenstraat 655, 2650 Edegem, Belgium
2. Department of Cardiothoracic Surgery, University Hospital Brussels, Laarbeeklaan 101, 1090 Jette, Belgium
3. ASTARC (Antwerp Surgical Training, Anatomy and Research Centre), University Hospital Antwerp, Drie Eikenstraat 655, 2650 Edegem, Belgium