1. Department of Cardiovascular Medicine, The University of Tokushima Graduate School of Health Biosciences, Tokushima 770-8503, Japan
2. Department of Medicine and Bioregulatory Sciences, The University of Tokushima Graduate School of Health Biosciences, Tokushima 770-8503, Japan
3. Department of Medical Education, The University of Tokushima Graduate School of Health Biosciences, Tokushima 770-8503, Japan