1. Department of Cardiology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
2. Department of Cardiology, Isala Hospital, 8000 GK Zwolle, The Netherlands
3. Department of Cardiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, 6202 AZ Maastricht, The Netherlands