[1] Oita Univ Nursing & Hlth Sci, Dept Mental Hlth & Psychiat Nursing, Notsuharu, Oita 8701201, Japan
[2] Natl Inst Environm Studies, Div Reg Environm, Tsukuba, Ibaraki, Japan
[3] Univ Ryukyus, Coll Educ, Dept Sch Hlth & Hlth Promot, Nishihara, Okinawa, Japan
[4] Gunma Univ, Fac Med, Dept Publ Hlth, Maebashi, Gumma 371, Japan
[5] Nagasaki Univ, Fac Med, Dept Publ Hlth, Nagasaki, Japan