1. Division of Cardiology-Section of Electrophysiology; Emory University School of Medicine; Atlanta Georgia USA
2. Southampton University Hospital; Southampton Hampshire UK
3. Department of Cardiology; Kepler University Hospital Linz Faculty of Medicine; Linz Austria
4. Medtronic; Mounds View; Minnesota USA
5. Baylor Scott and White Health Care; Dallas; Texas USA
6. Section of Clinical Electrophysiology, Department of Cardiology; Military Hospital-State Health Center; Budapest Hungary