1. Department of Medicine, Osaka Ekisaikai Hospital
2. Heart Center, Tokyo Bay Urayasu/Ichikawa Medical Center
3. Division of Cardiology, Sakurabashi Watanabe Hospital
4. Clinical Laboratory, The University of Tokyo Hospital
5. Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine and Dentistry
6. Department of Cardiology, Nishinomiya Watanabe Cardiovascular Center