1. Graduate School of Comprehensive Human Sciences, University of Tsukuba
2. Faculty of Health and Sport Science, Ryutsu Keizai University
3. Faculty of Health and Sport Science, Juntendo University
4. Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health
5. Faculty of Human Sciences, Shimane University
6. Faculty of Health and Sport Sciences, University of Tsukuba