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Yasunori Sakakura
Department of Oral Anatomy, School of Dentistry, Health Sciences University of Hokkaido
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Eichi Tsuruga
Department of Oral Anatomy, School of Dentistry, Health Sciences University of Hokkaido
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Noriyuki Shide
Physical Education Laboratory, Hokkaido University of Education Hakodate Campus
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Toshihiko Yajima
Department of Oral Anatomy, School of Dentistry, Health Sciences University of Hokkaido