1. Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
2. Clinical Research Center in Hiroshima, Hiroshima University Hospital
3. Department of Cardiology, Shuto General Hospital
4. Department of Cardiology, Saiseikai Yamaguchi Hospital
5. Department of Cardiology, Tokuyama Central Hospital
6. Department of Nursing, Faculty of Health Sciences, Ube Frontier University
7. Department of General Medicine, Tokuyama Central Hospital