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Masahide KOYAMA
Department of Hygiene and Oral Health, School of Dentistry, Showa University
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Shigeru KUROIWA
Department of Hygiene and Oral Health, School of Dentistry, Showa University
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Masakazu KAWAI
Department of Hygiene and Oral Health, School of Dentistry, Showa University
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Tetsuhiko TACHIKAWA
Department of Oral Pathology, School of Dentistry, Showa University