1. Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo; Tokyo Japan
2. Department of Cardiology; Tokyo Metropolitan Tama Medical Center; Tokyo Japan
3. Department of Cardiology, Tama-Hokubu Medical Center; Tokyo Japan
4. Department of Clinical Data Management and Research, Clinical Research Center; National Hospital Organization Headquarters; Tokyo Japan
5. Department of Health Policy and Informatics; Graduate School of Medicine, Tokyo Medical and Dental University; Tokyo Japan