1. Department of Cardiology, Catharina Hospital Eindhoven, Michelangelolaan 2, 5623 EJ Eindhoven, The Netherlands
2. Department of Internal Medicine, Onze Lieve Vrouwe Gasthuis, Oosterpark 9, 1091 AC, Amsterdam, The Netherlands
3. Department of Cardiothoracic Surgery, University Medical Center, Utrecht, The Netherlands
4. Department of pathology, University Medical Center, Utrecht, The Netherlands
5. Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands