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Hideki Takai
Department of Periodontology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 - 8587, Japan Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 - 8587, Japan
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Tadashi Kitazawa
Department of Periodontology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 - 8587, Japan
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Yorimasa Ogata
Department of Periodontology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 - 8587, Japan Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 - 8587, Japan