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Hiroshi Ogawa
Department of Hygiene, Kinki University School of Medicine
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Chiyo Shiota
Department of Hygiene, Kinki University School of Medicine
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Kiyomi Asai
Department of Hygiene, Kinki University School of Medicine
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Shinichi Fukushima
Department of Hygiene, Kinki University School of Medicine
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Sukenari Sasagawa
Department of Hygiene, Kinki University School of Medicine