1. Na Li, PhD, VIP Dental Care Clinic, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
2. Toru Nikaido, DDS, PhD, Graduate School, Cariology and Operative Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
3. Sadr Alireza, DDS, PhD, Graduate School, Cariology and Operative Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
4. Tomohiro Takagaki, DDS, PhD, Cariology and Operative Dentistry, Department of Restorative Sciences, Tokyo Medical and Dental University, Tokyo, Japan
5. Ji-Hua Chen, DDS, PhD, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
6. Junji Tagami, DDS, PhD, Cariology and Operative Dentistry, Tokyo Medical and Dental University, Tokyo, Japan