1. Department of Cardiology, Aarhus University Hospital, Skejby, Denmark
2. Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
3. Department of Internal Medicine, Electrophysiology Service, University of Campinas Hospital, Campinas, Brazil
4. Department of Electrophysiology, Leipzig Heart Center at University of Leipzig, Leipzig, Germany
5. Division of Cardiology, Department of Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA