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Masatsugu Kanamitsu
Department of Hygiene, Sapporo Medical College
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Tadao Kawarabayashi
Department of Hygiene, Sapporo Medical College
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Kazuo Kita
Department of Hygiene, Sapporo Medical College
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Tamotsu Taira
Department of Hygiene, Sapporo Medical College
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Shingo Yamaguchi
Department of Hygiene, Sapporo Medical College
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Nobuo Hashimoto
Department of Hygiene, Sapporo Medical College
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Tokuo Noriteki
Sapporo Municipal West Health Center
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Susumu Watanabe
Sapporo Municipal Central Health Center