1. Department of Cardiology; University Medical Center Utrecht; Utrecht The Netherlands
2. Department of Radiotherapy; University Medical Center Utrecht; Utrecht The Netherlands
3. Department of Cardiology; Amphia Hospital Breda; Breda The Netherlands
4. Department of Cardiothoracic Surgery; Academic Medical Center Amsterdam; Amsterdam The Netherlands
5. Department of Cardiology; Diaconessenhuis Hospital Leiden; Leiden The Netherlands
6. Department of Cardiology; St. Jansdal Hospital Harderwijk; Harderwijk The Netherlands