1. Department of Plastic Surgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
2. Department of Gynaecology and Obstetrics, The Second Hospital of Jilin University, Changchun, Jilin 130022, P.R. China
3. Department of Pathophysiology, College of Basic Medical Science, Jilin University, Changchun, Jilin 130021 P.R. China