| Affiliation: | 1. Division of Periodontology, Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan;2. Department of Periodontology, School of Dental Medicine, Tsurumi University, Yokohama, Japan;3. Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan;4. Bunkyo‐Dori Dental Clinic, Chiba, Japan;5. Division of Periodontology, Department of Oral Interdisciplinary Medicine, School of Dentistry, Kanagawa Dental University, Yokosuka, Japan;6. Seikeikai Hospital, Seikeikai Group, Yokohama, Japan |
