1. Faculty of Human Sciences, Osaka University of Economics
2. Graduate School of Arts and Sciences, The University of Tokyo
3. Faculty of Human Sciences, Shimane University
4. Occupational Epidemiology Research Group, National Institute of Occupational Safety and Health
5. Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health
6. Faculty of Health and Sport Sciences, University of Tsukuba