Affiliation: | 1. Department of Periodontology, Nihon University School of Dentistry at Matsudo, Chiba, 271-8587, Japan;2. Anhui Medical University of Stomatology Hospital, Anhui, China;3. Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Chiba, 271-8587, Japan;4. Central Research Institute, Maruha-Nichiro Holdings Inc., 16-2 Wadai, Tsukuba, Ibaraki, 300-4247, Japan |