1. Department of Cardiovascular Medicine, Baba Memorial Hospital
2. Second Department of Internal Medicine, University of Occupational and Environmental Health
3. Department of Cardiovascular Medicine, Wakayama Medical University
4. Department of Cardiovascular Medicine, Ishikiriseiki Hospital
5. Department of Medicine, Osaka Ekisaikai Hospital
6. Nishinomiya Watanabe Cardiovascular Center
7. Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine