1. Fukuoka Tokushukai Medical Center, Department of General Medicine, Kasuga, Japan
2. The Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
3. Isen Clinic, Kagoshima, Japan
4. Tokunoshima Tokushukai Hospital, Kagoshima, Japan
5. Faculty of Health Care Sciences, Department of Clinical Engineering, Jikei University of Health Care Sciences, Tokyo, Japan