1. Department of CardiologyUniversity Medical Center UtrechtUtrecht The Netherlands
2. Department of Extracorporeal CirculationSt Antonius HospitalNieuwegein The Netherlands
3. Netherlands Heart InstituteUtrecht The Netherlands
4. Department of ElectrophysiologyAlfried Krupp KrankenhausEssen Germany
5. Faculty of HealthWitten/Herdecke UniversityWitten Germany