Affiliation: | (1) Department of Pediatrics, Hiroshima University School of Medicine, 1-2-3, Kasumi, Minamiku, 734 Hiroshima, Japan;(2) Hiroshima City Clinical Research Center, 1-4-15, Kokutaiji, Nakaku, 730 Hiroshima, Japan;(3) Association of Environmental and Public Health, City of Osaka, 3-1, Sebachuou, Chuou-ku, 541 Osaka, Japan |