1. Department of Cardiology; Kishiwada Tokushukai Hospital; Kishiwada Japan
2. Department of Medicine and Biosystemic Science; Kyushu University Graduate, School of Medical Sciences; Fukuoka Japan
3. Department of Cardiology; Morinomiya Hospital; Osaka Japan
4. Department of Cardiology; Shin Koga Hospital; Kurume Japan
5. Cardiovascular Division; Hyogo College of Medicine; Nishinomiya Japan
6. Department of Cardiology; Miyazaki Medical Association Hospital; Miyazaki Japan
7. Department of Cardiology, Tokeidai Memorial Hospital; Sapporo Japan