1. Department of Cardiovascular Medicine; Yao Municipal Hospital; Osaka Japan
2. Department of Cardiovascular Medicine; Osaka University Graduate School of Medicine; Osaka Japan
3. Division of Cardiology; Osaka General Medical Center; Osaka Japan
4. Department of Cardiology; Amagasaki Chuo Hospital; Hyogo Japan
5. Cardiovascular Division; Kobe Ekisaikai Hospital; Hyogo Japan