1. The Second Department of Internal Medicine University of Occupational and Environment Health Kitakyushu Japan
2. The Department of Environmental Epidemiology Institute of Industrial Ecological Sciences University of Occupational and Environmental Health Kitakyushu Japan
3. Division of Cardiology Kumamoto Junkankika Hospital Kumamoto Japan
4. Division of Cardiology Japan Community Healthcare OrganizationKyushu Hospital Kitakyusyu Japan
5. Division of Cardiology Saiseikai Fukuoka General Hospital Fukuoka Japan
6. Department of Cardiovascular Surgery Iizuka Hospital Iizuka Japan
7. Department of Cardiology Osaka Police Hospital Osaka Japan
8. Department of Cardiology Sasebo City General Hospital Sasebo Japan
9. Department of Cardiology Fukuoka University School of Medicine Fukuoka Japan
10. Department of Internal Medicine, Circulatory and Body Fluid Regulation Faculty of Medicine University of Miyazaki Miyazaki Japan
11. Department of Cardiology Sasebo Chuo Hospital Nagasaki Japan
12. Department of Cardiology National Hospital Organization Kyushu Medical Center Fukuoka Japan
13. Department of Cardiology Yuai Medical Center Okinawa Japan
14. Cardiac Electrophysiology and Pacing Laboratory Division of Cardiovascular Medicine Makiminato Central Hospital Okinawa Japan
15. Department of Cardiology Saga‐ken Medical Centre Koseikan Saga Japan
16. Department of Heart Rhythm Management University of Occupational and Environment Health Kitakyusyu Japan