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*Masami Ninomiya
Department of Periodontology and Endodontology, Institute of Health Biosciences, University of Tokushima Graduate School
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Hiroaki Tanaka
Department of Periodontology and Endodontology, Institute of Health Biosciences, University of Tokushima Graduate School
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Tae Usami
Dental Hygiene Section, Tokushima University Hospital
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Toshihiko Nagata
Department of Periodontology and Endodontology, Institute of Health Biosciences, University of Tokushima Graduate School