1. Division of Cardiology, Department of Internal Medicine, Iwate Medical University
2. Department of Cardiology, Iwate Prefectural Chubu Hospital
3. Department of Cardiology, Iwate Prefectural Iwai Hospital
4. Department of Cardiology, Iwate Prefectural Isawa Hospital
5. Department of Cardiology, Iwate Prefectural Miyako Hospital
6. Department of Cardiology, Iwate Prefectural Ninohe Hospital
7. Department of Cardiology, Japanese Red Cross Morioka Hospital
8. Department of Cardiology, Iwate Prefectural Kuji Hospital
9. Department of Cardiology, Iwate Prefectural Central Hospital