1. Department of Cardiovascular Medicine, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
2. Department of Cardiology Yokohama Rosai Hospital Yokohama Japan
3. Clinical Engineering Department Yokohama Rosai Hospital Yokohama Japan
4. Department of Cardiology Fukuoka Red Cross Hospital Fukuoka Japan
5. Department of Cardiology Fukuoka City Hospital Fukuoka Japan
6. Department of Cardiology St. Mary's Hospital Fukuoka Japan
7. Department of Cardiology, Faculty of Medicine University of Tsukuba Ibaraki Japan