1. Department of Cardiovascular MedicineTohoku University Graduate School of Medicine Seiryo‐machi 1–1 Sendai Miyagi 980–8574 Japan
2. Department of Evidence‐based Cardiovascular MedicineTohoku University Graduate School of Medicine Miyagi Japan
3. Department of Cardiovascular MedicineInternational University of Health and Welfare Hospital Tochigi Japan
4. Cardiovascular Division, Sendai Medical CenterNational Hospital Organization Miyagi Japan
5. Cardiovascular Division, Iwaki City Medical Center Fukushima Japan
6. Department of Cardiovascular MedicineIwate Prefectural Isawa Hospital Iwate Japan
7. Department of Cardiovascular MedicineTohoku Medical and Pharmaceutical University Miyagi Japan
8. Department of Cardiovascular MedicineSendai Open Hospital Miyagi Japan
9. Department of Cardiovascular MedicineIwate Prefectural Central Hospital Iwate Japan
10. Cardiovascular DivisionOsaki Citizen Hospital Miyagi Japan
11. Cardiovascular DivisionKurihara Central Hospital Miyagi Japan
12. Cardiovascular DivisionSenen Rifu Hospital Miyagi Japan
13. Cardiovascular DivisionKojirakawa Shieido Hospital Miyagi Japan
14. Cardiology DepartmentIwate Health Service Association Iwate Japan
15. Division of Epidemiology, Department of Public Health and Forensic MedicineTohoku University Graduate School of Medicine Miyagi Japan