1. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xincheng, Xi'an, Shaanxi, China
2. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomology, Fourth Military Medical University, Xincheng, Xi'an, Shaanxi, China