1. Department of Cardiology; Saiseikai Yokohama City Eastern Hospital; Yokohama Japan
2. Department of Cardiology; Kyushu Medical Center; Fukuoka Japan
3. Department of Cardiology; Toyohashi Heart Center; Toyohashi Japan
4. Department of Cardiology; Hyogo Medical University; Nishinomiya Japan
5. Department of Preventive Medicine and Community Health; University of Occupational and Environmental Health; Kitakyushu Japan
6. Department of Cardiology; Kobe University; Kobe Japan
7. Department of Cardiology; Rinku General Hospital; Izumi-Sano Japan
8. Department of Cardiology; Himeji Cardiovascular Center; Himeji Japan
9. Department of Cardiology; Shiroyama Hospital; Habikino Japan