1. Department of Endodontics, Fourth Military Medical University, Xi’an, Shaanxi, People’s Republic of China.
2. Center of Oral Disease, 306th Hospital, Beijing, People’s Republic of China.
3. Department of Orthodontics, Fourth Military Medical University, Xi’an, Shaanxi, People’s Republic of China.
4. Department of Oral and Maxillofacial Surgery, Fourth Military Medical University, Xi’an, Shaanxi, People’s Republic of China.
5. Department of Implantology, School of Stomatology, Fourth Military Medical University, Xi’an, Shaanxi, People’s Republic of China.
6. Department of Periodontology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China.