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Azusa AKIMOTO
Department of Pedodontics, School of Dentistry, Showa University
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Kazuyuki SEGAWA
The First Department of Oral Anatomy, School of Dentistry, Showa University
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Reiji TAKIGUCHI
The First Department of Oral Anatomy, School of Dentistry, Showa University
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Ryuuji SASA
Department of Pedodontics, School of Dentistry, Showa University