Affiliation: | (1) Osaka Prefectural Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, 537 Osaka;(2) Department of Hygiene and Pharmacology, Setsunan University, Nagaotouge-cho 45-1, 573 Hirakata;(3) Department of Environment Conservation, Ehime University, Tarumi 3-5-7, 790 Matsuyama, Japan |