1. Department of Cardiology University Medical Centre Utrecht, Utrecht University Heidelberglaan 100 Utrecht 3584 CX The Netherlands
2. Department of Cardiothoracic Surgery University Medical Centre Utrecht, Utrecht University Utrecht The Netherlands
3. Department of Methodology and Statistics Utrecht University Utrecht The Netherlands
4. Department of Intensive Care Medicine University Medical Centre Utrecht, Utrecht University Utrecht The Netherlands
5. Department of Anaesthesiology University Medical Centre Utrecht, Utrecht University Utrecht The Netherlands
6. Institute of Cardiovascular Science, Faculty of Population Health Sciences University College London London UK