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Ryo Aizawa
Department of Periodontology, Showa University School of Dentistry
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Junichi Tanaka
Division of Pathology, Department of Oral Diagnostic Sciences, Showa University School of Dentistry
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Kenji Mishima
Division of Pathology, Department of Oral Diagnostic Sciences, Showa University School of Dentistry
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Matsuo Yamamoto
Department of Periodontology, Showa University School of Dentistry