1. Department of Cardiovascular Medicine; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki Japan
2. Department of Cardiovascular Medicine; National Cerebral and Cardiovascular Center; Osaka Japan
3. Division of Cardiology; Kyoritsu Hospital; Hyogo Japan
4. Department of Cardiovascular Surgery; National Cerebral and Cardiovascular Center; Osaka Japan
5. Division of Cardiovascular Medicine; Kanazawa University Graduate School of Medical Science; Kanazawa Japan