1. Division of Cardiovascular Medicine, Department of Medicine Kurume University School of Medicine 67 Asahi‐machi Kurume 830‐0001 Japan
2. Centre Hospitalier Universitaire de Toulouse Toulouse France
3. Department of Cardiology Keio University School of Medicine Tokyo Japan
4. Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Osaka Japan
5. Department of Neurology, Graduate School of Medical Sciences Kumamoto University Kumamoto Japan
6. Pfizer Japan Inc. Tokyo Japan
7. Department of Cardiology and Geriatrics, Kochi Medical School Kochi University Kochi Japan