Affiliation: | 1. Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry, , Tokyo, Japan;2. Department of Periodontology, Nihon University School of Dentistry, , Tokyo, Japan;3. Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, , Tokyo, Japan;4. Nihon University School of Dentistry, , Tokyo, Japan |