[1] Nihon Univ, Sch Med, Dept Social Med, Div Publ Hlth, Tokyo, Japan
[2] Oita Univ, Fac Med, Dept Publ Hlth & Epidemiol, Oita 87011, Japan
[3] Joetsu Univ Educ, Hlth Care & Special Support Grad Sch Educ, Div Clin Psychol, Niigata, Japan
[4] Tottori Univ, Fac Med, Dept Social Med, Div Environm & Prevent Med, Tottori 680, Japan
[5] Yokohama City Univ, Grad Sch Med, Dept Epidemiol & Publ Hlth, Yokohama, Kanagawa, Japan
[6] Suzuki Mental Clin, Kanagawa, Japan
[7] Natl Hosp Org, Kurihama Med & Addict Ctr, Kanagawa, Japan