1. Department of Pulmonary Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Japan
2. Department of Hygiene and Public Health, Teikyo University School of Medicine, Japan
3. Waseda University Organization of Asia Human Community, Japan
4. Department of Social Health and Stress Management, Graduate School of Comprehensive Human Science, University of Tsukuba, Japan
5. Faculty of Health and Sport Sciences, University of Tsukuba, Japan
6. Choju Medical Institute, Fukushimura Hospital, Japan
7. Department of Community-based Medicine, Nagoya City University Graduate School of Medicine, Japan
8. Yurin Hospital, Japan