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Yuriko Igarashi
1 Department of Anatomy, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271– 8587, Japan
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Shintaro Kondo
1 Department of Anatomy, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271– 8587, Japan
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Minami Kaneko
Department of Precision Machinery Engineering, Nihon University College of Science and Technology, Funabashi, Chiba 274– 8501, Japan
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Megumi Aibara
Department of Precision Machinery Engineering, Nihon University College of Science and Technology, Funabashi, Chiba 274– 8501, Japan
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Fumio Uchikoba
Department of Precision Machinery Engineering, Nihon University College of Science and Technology, Funabashi, Chiba 274– 8501, Japan