1. Department of Gynecologic Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
2. Clinical research design division, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
3. Department of Gynecology, Shenshan Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Shanwei, China.