1. Division of Cardiology (Okumura); Saiseikai Kumamoto Hospital Cardiovascular Center; Kumamoto Japan
2. Osaka Medical Center for Cancer and Cardiovascular Diseases; Osaka Japan
3. Department of Neurology (Tanahashi); Saitama Medical University International Medical Center; Saitama Japan
4. Division of Cardiac and Vascular Sciences (Camm); St. George's University of London; London United Kingdom