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Katsuma Takagi
Nihon University Graduate School of Dentistry at Matsudo, Orthodontics, Matsudo, Chiba 271– 8587, Japan
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Mami Shimizu
Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271–8587, Japan
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Shinichi Negishi
Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271–8587, Japan