1. Department of Gynecology and Obstetrics, The First Affiliated Hospital of Jinan University, Guangzhou, China
2. Department of General Surgery, Panyu Central Hospital, Guangzhou, China
3. The First Affiliated Hospital of Gannan Medical College, Jiangxi, China
4. Department of Gynecology and Obstetrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China