Affiliation: | Li-Li Jiang, Kui-Ran Liu, Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, ChinaDe-Ming Tong, Department of General Surgery, Northen War General Hospital Heping Branch Hospital, Shenyang 110004, Liaoning Province, ChinaZi-Yi Feng, College of Clinical Medicine Science, China Medical University, Shenyang 110013, Liaoning Province, China |