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*Kaoru Tamazawa
Division of Periodontology and Endodontology, Department of Oral Biology, Tohoku University Graduate School of Dentistry
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Yoshinori Tamazawa
Division of Infection Control, Tohoku University Hospital
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Hidetoshi Shimauchi
Division of Periodontology and Endodontology, Department of Oral Biology, Tohoku University Graduate School of Dentistry