| Affiliation: | 1. Division of Preventive Dentistry, Department of Oral Health Science, Graduate School of Medical and Dental Sciences, Niigata University, , Niigata, Japan;2. Unit of Periodontology, Department of Restorative Dentistry, Periodontology and Endodontology, University Medicine Greifswald, Ernst‐Moritz‐Arndt‐University Greifswald, , Greifswald, Germany;3. Division of Oral Science for Health Promotion, Department of Oral Health and Welfare, Graduate School of Medical and Dental Sciences, Niigata University, , Niigata, Japan;4. Department of Prosthetic Dentistry, Gerodontology and Biomaterials, Centre of Oral Health, University of Greifswald, , Greifswald, Germany;5. Institute of German Dentists, , K?ln, Germany;6. Department of Conservative Dentistry, Medical Faculty Carl Gustav Carus, TU Dresden, , Dresden, Germany |
