1. Department of Cardiology; Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht; Maastricht the Netherlands
2. Department of Physiology; Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht; Maastricht the Netherlands
3. Department of Cardiology; University Medical Center Groningen; Groningen the Netherlands
4. Medtronic Bakken Research Center Maastricht; Maastricht the Netherlands
5. Department of Cardiology; Rijnstate Hospital Arnhem; Arnhem the Netherlands