1. Osaka University Graduate School of DentistrySuitaJapan
2. Kaken Pharmaceutical Co.LtdTokyoJapan
3. Graduate School of Dental MedicineHokkaido UniversitySapporoJapan
4. School of DentistryHealth Sciences University of HokkaidoIshikari‐TobetsuJapan
5. Graduate School of Oral MedicineMatsumoto Dental UniversityShiojiriJapan
6. Dental Training CenterKensei‐kai Medical Incorporated AssociationNumazuJapan
7. Graduate School of DentistryTohoku UniversitySendaiJapan
8. School of Dentistry at MatsudoNihon UniversityMatsudoJapan
9. School of DentistryShowa UniversityTokyoJapan
10. School of MedicineKeio UniversityTokyoJapan
11. School of DentistryNihon UniversityTokyoJapan
12. Machida Municipal HospitalTokyoJapan
13. Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityTokyoJapan
14. School of Dental MedicineTsurumi UniversityYokohamaJapan
15. Graduate School of Medical and Dental SciencesNiigata UniversityNiigataJapan
16. Dental HospitalAichi‐Gakuin UniversityNagoyaJapan
17. School of DentistryAichi‐Gakuin UniversityNagoyaJapan
18. Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
19. Institute of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
20. Institute of Health BiosciencesGraduate SchoolUniversity of TokushimaTokushimaJapan
21. Department of PeriodontologyKyushu UniversityFukuokaJapan
22. Medical Corporation Fukuwa‐kai Beppu Dental ClinicFukuokaJapan
23. Fukuoka Dental CollegeFukuokaJapan
24. Graduate School of Biomedical SciencesNagasaki UniversityNagasakiJapan
25. Graduate School of Medical and Dental SciencesKagoshima UniversityKagoshimaJapan
26. Nakayamadera Imai ClinicTakarazukaJapan
27. Rinku General Medical CenterOsakaJapan