1. School of Medicine Xiamen University Xiamen Fujian Province P. R. China
2. President Office Tung Wah College Hong Kong P. R. China
3. Department of Gynecology and Obstetrics Zhongshan HospitalXiamen University Xiamen Fujian Province P. R. China
4. Department of Gynecology, Women and Children’s Hospital School of Medicine Xiamen University Xiamen Fujian Province P. R. China
5. Department of Gynecology and Obstetrics the First Affiliated HospitalXiamen University Xiamen Fujian Province P. R. China