1. Department of Cardiothoracic Surgery Maastricht University Medical Centre Maastricht The Netherlands
2. Cardiovascular Research Institute Maastricht Maastricht The Netherlands
3. Department of Cardiology Maastricht University Medical Centre Maastricht The Netherlands
4. Department of Clinical Epidemiology and Medical Technology Assessment Maastricht University Medical Center Maastricht The Netherlands
5. Department of Cardiology Hospital East Limburg Genk Belgium
6. Department of Cardiac Surgery UZ Brussel Brussels Belgium