1. Department of Periodontology, Nihon University School of Dentistry
2. Department of Periodontology, Tokyo Dental College
3. Division of Periodontics, Department of Conservative Dentistry, Ohu University School of Dentistry
4. Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry
5. Department of Periodontology, Division of Oral Infections and Health Sciences, Asahi University School of Dentistry
6. Department of Periodontology, Nihon University School of Dentistry at Matsudo
7. SEIKEIKAI clinic
8. Department of Advanced Clinical Medicine, Division of Oral Reconstruction, Kanagawa Dental University