1. School of Health and Nursing Science, Wakayama Medical University, Wakayama, Japan
2. Department of Hygiene, School of Medicine, Wakayama Medical University, Wakayama, Japan
3. Faculty of Budo and Sport Studies, Tenri University, Nara, Japan
4. Department of Public Health, School of Medicine, Wakayama Medical University, Wakayama, Japan
5. Department of Cardiology, Sumiya Rehabilitation Hospital, Wakayama, Japan