Institution: | 1. Department of Oral Histology-Developmental Biology and Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehagro, Chongro-gu, Seoul, 110-744, South Korea 2. Department of Dental Hygiene, Namseoul University, Cheonan, 331-707, Chungcheongnam-Do, South Korea
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