1. Northern Centre for Healthcare Research, University Medical Centre Groningen; University of Groningen; The Netherlands
2. Department of Cardiology, Thoraxcenter, University Medical Centre Groningen; University of Groningen; The Netherlands
3. Department of Cardiology; Rijnland Hospital; Leiderdorp The Netherlands
4. Department of Clinical Pharmacology, University Medical Centre Groningen; University of Groningen; The Netherlands