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