1. Philips Research; Eindhoven the Netherlands
2. Department of Cardiology; St Antonius Hospital; Nieuwegein the Netherlands
3. school CAPHRI; Maastricht University Medical Center; Maastricht the Netherlands
4. Philips Lighting; Eindhoven the Netherlands
5. Consultants in Quantitative Methods BV; Eindhoven the Netherlands
6. Department of Cardiology; Maastricht University Medical Center; Maastricht the Netherlands