1. Department of Cardiology; Saiseikai Yokohama City Eastern Hospital; Yokohama Japan
2. Department of Cardiology; Kobe University Graduate School of Medicine; Kobe Japan
3. Department of Cardiology; Hyogo Medical University; Nishinomiya Japan
4. Department of Cardiology; Shiroyama Hospital; Habikino Japan
5. Department of Cardiology; Rinku General Hospital; Izumi-Sano Japan
6. Department of Cardiology; North Harima Medical Center; Ono Japan
7. Department of Cardiology; Toyohashi Heart Center; Toyohashi Japan
8. Department of Cardiology; Kyushu Medical Center; Fukuoka Japan