1. Faculty of Nursing, Setsunan University, Osaka, Japan
2. Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan
3. Center for Sleep Medicine, Department of Neurology Asahi University Hospital, Gifu, Japan
4. Health and Counseling Center, Osaka University, Osaka, Japan
5. Department of Health Sciences, Osaka University Graduate School of Medicine, Osaka, Japan
6. Department of Oral Physiology, Osaka University Graduate School of Dentistry, Osaka, Japan