1. Division of Cardiology, Toyama Cardiovascular Clinic
2. Clinical Research Center, Nara Medical University Graduate School of Medicine
3. Department of Internal Medicine, Tatebayashi Kosei Hospital
4. Department of Cardiovascular Medicine, Isesaki Municipal Hospital
5. Division of Cardiology, Fujioka General Hospital
6. Division of Cardiology, Takasaki General Medical Center
7. Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine
8. Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine