1. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology; School of Stomatology; The Fourth Military Medical University; Xi'an China
2. Department of Stomatology; The 456th Hospital of People's Liberation Army; Jinan China
3. Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Centre; The Fourth Military Medical University; Xi'an China
4. School of Stomatology; The Third Affiliated Hospital of Xinxiang Medical University; Xinxiang China