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Masana OGATA
Department of Public Health, Okayama University Medical School
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Tsuyoshi KIHARA
Department of Gastroenterology, Kawasaki Medical School
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Ryuichi KAMOI
Department of Gastroenterology, Kawasaki Medical School
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Toyohiro TAGUCHI
Department of Public Health, Okayama University Medical School
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Junko ODA
Okayama Prefectual Research Center of Environment and Health
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Katashi KENMOTSU
Okayama Prefectual Research Center of Environment and Health