title: Abustracts from Japanese journal of hygiene (Nihon Eiseigaku Zasshi) vol.53 no.4.
authors: Department of Epidemiology and Environmental Health, Juntendo University School of Medicine, Tokyo.
authors: M
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authors: Chiba
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authors: Ohmichi
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authors: Inaba
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authors: Okajima
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authors: Araki
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authors: Murata
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authors: Yokoyama
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authors: Sankai
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authors: Iso
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authors: Shimamoto
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authors: Kitamura
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authors: Naito
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authors: Sato
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authors: Okamura
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authors: Imano
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authors: Iida
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authors: Komachi
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authors: Ogawa
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authors: Imaki
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authors: Yoshida
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authors: Tanada
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authors: Kudo
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authors: Ohira
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authors: Tanigawa
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authors: Umemura
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authors: Koike
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authors: Ohida
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authors: Osaki
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authors: Mochizuki
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authors: Kawaguchi
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authors: Minowa
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authors: Watanabe
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authors: Kono
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authors: Nishiura
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authors: Miyata
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authors: Saito
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authors: Arashidani
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authors: Yoshikawa
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authors: Kawamoto
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authors: Matsuno
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authors: Kodama