Department of Obstetrics and Gynecology, 202 Military Hospital of China, Shenyang, Liaoning 110812, China;
Department of Obstetrics and Gynecology, 202 Military Hospital of China, Shenyang, Liaoning 110812, China;
Department of Obstetrics and Gynecology, 202 Military Hospital of China, Shenyang, Liaoning 110812, China;
Department of Obstetrics and Gynecology, 202 Military Hospital of China, Shenyang, Liaoning 110812, China;
Department of Obstetrics and Gynecology, 202 Military Hospital of China, Shenyang, Liaoning 110812, China;