1. Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
2. Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart and Chest Hospital
3. Department of Cardiology, Ube-Kohsan Central Hospital
4. Department of Medicine and Clinical Science, Faculty of Health Sciences, Yamaguchi University Graduate School of Medicine
5. Ultrasound Examination Center, Yamaguchi University Hospital
6. Department of Therapeutic Science for Heart Failure in the Elderly, Yamaguchi University Graduate School of Medicine