Affiliation: | 1. Department of Oral Histology, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri, Nagano, 399-0781, Japan 2. Institute for Dental Science, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri, Nagano, 399-0781, Japan 3. Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkocho-dori 2-bancho, Chuo-ku, Niigata, 951-8514, Japan 4. Department of Endodontics and Operative Dentistry, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri, Nagano, 399-0781, Japan
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