1. Department of Stomatology, Chinese PLA General Hospital, Beijing, PR China
2. Central Medical Branch of Chinese PLA General Hospital, Beijing, PR China
3. Department of General Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China
4. Department of Anatomy the Basic Medicine College, Inner Mongolia Medical University, Hohhot, Inner Mongolia, PR China