1. Department of Cardiology, Aizawa Hospital, Japan
2. Department of Cardiovascular Medicine, Shinshu University School of Medicine, Japan
3. Department of Cardiology, Nagano Municipal Hospital, Japan
4. Department of Cardiology, Shinonoi General Hospital, Japan
5. Department of Cardiology, Nagano Red Cross Hospital, Japan
6. Department of Cardiology, Iida Hospital, Japan
7. Department of Cardiology, Saku Central Hospital, Japan
8. Department of Cardiology, Joetsu General Hospital, Japan
9. Department of Cardiology, Suwa Central Hospital, Japan
10. Department of Cardiology, Suwa Red Cross Hospital, Japan
11. Department of Cardiology, Okaya City Hospital, Japan
12. Department of Cardiology, Ina Central Hospital, Japan