1. Nanjing Stomatological Hospital Medical School of Nanjing University Nanjing China
2. Department of Anatomy, Histology and Embryology State Key Laboratory of Reproductive Medicine The Research Center for Bone and Stem Cells Nanjing Medical University Nanjing China
3. Department of Non‐communicable Disease Prevention Nanjing Municipal Center for Disease Control and Prevention Nanjing China
4. Reproductive Center Nanjing Medical University Affiliated Changzhou Maternal and Child Health Care Hospital Changzhou China
5. Institute of Stomatology Nanjing Medical University Nanjing China
6. The Research Center for Aging Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University Nanjing China