1. Department of Cardiology Federation of National Public Service Personnel Mutual Aid Association Tachikawa Hospital Tachikawa Japan
2. Department of Cardiology University of Liège Hospital CHU Sart Tilman Liege Belgium
3. Department of Cardiology School of Medicine Keio University Tokyo Japan
4. Department of Cardiology National Defense Medical College Hospital Tokorozawa Japan
5. Center for Preventive Medicine School of Medicine Keio University Tokyo Japan
6. Department of Cardiovascular Surgery School of Medicine Keio University Tokyo Japan