1. Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
2. Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
3. Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center
4. Department of Pediatric Cardiology, Saitama Medical University International Medical Center
5. Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
6. Department of Cardiovascular Medicine, Nippon Medical School