1. Occupational Stress and Health Management Research Group, National Institute of Occupational Safety and Health, Kanagawa & Tokyo, Japan
2. Department of Food and Nutrition, Faculty of Human Sciences and Design, Japan Women's University, Tokyo, Japan
3. Division of Health and Nutrition, Tohoku Seikatsu Bunka University, Sendai, Japan
4. Department of Nursing, Faculty of Medicine, Saga University, Saga, Japan