1. Department of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an, China.
2. Research and Development Center for Tissue Engineering, Fourth Military Medical University, Xi'an, China.
3. State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, Fourth Military Medical University, Xi'an, China.
4. Department of Gynecology and Obstetrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China.
5. State Key Laboratory of Military Stomatology, Department of Oral Histology and Pathology, School of Stomatology, Fourth Military Medical University, Xi'an, China.