1. Department of Oral Anatomy and Physiology, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology The Fourth Military Medical University Xi'an China
2. Department of Stomatology, Technology Innovation Park The Fourth Hospital of Harbin Medical University Harbin China
3. Department of Stomatology the Fourth Hospital of Harbin Medical University Harbin China
4. Department of Periodontology the Fourth Hospital of Harbin Medical University Harbin China
5. Department of Stomatology, Beijing Tongren Hospital Capital Medical University Beijing China