1. Department of Cardiothoracic Surgery, University Medical Centre Utrecht, Utrecht University, the Netherlands
2. Van Creveldkliniek, University Medical Centre Utrecht, Utrecht University, the Netherlands
3. Central Diagnostic Laboratory, University Medical Centre Utrecht, Utrecht University, the Netherlands
4. Department of Cardiology, University Medical Centre Utrecht, Utrecht University, the Netherlands
5. Department of Pathology, University Medical Centre Utrecht, Utrecht University, the Netherlands