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*Tatsuhiro Hidaka
Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido
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Akira Ishisaki
Department of Biochemistry, Iwate Medical University School of Dentistry
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Takashi Kado
Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido
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Kaname Shirai
Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido
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Yasushi Furuichi
Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido