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Hiroshi TANAKA
Department of Public Health, School of Medicine, Tokyo Medical and Dental University. [Japan]
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Yoshiyuki SHIROMA
Institute for Medical Research on Rural Welfare, School of Medicine, Tokyo Medical and Dental University. [Japan]
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Nobuo KUMADA
Department of Medical Zoology, School of Medicine, Tokyo Medical and Dental University. [Japan]
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Kijin FUKUMINE
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Hikoichi KAWAMITSU
Miyako Health Center, Ryukyus. [Japan]