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Kenji HARADA
Gunma Prefectural Institute of Health
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Kishiro SHIMIZU
Gunma Prefectural Institute of Health
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Tatsuo MATSUYAMA
Gunma Prefectural Institute of Health
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Shigeto KOMIYAMA
Gunma Prefectural Institute of Health
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Susumu MITSUHASHI
Dep. of Microbiology, School of Medicine, Gunma University