Li Siwei, Zhang Shize, Li Yanxi, Yang Weiting, Jiang Lin, Chang Xing, Liu Hui, Huang Ying, Wen Xin, Yang Yanfang, Yu Hailiang, Miao Fengyu, Liu Zhongfu
Department of Obstetrics and Gynecology, the First People's Hospital of Liangshan Yi Autonomous Prefecture, Xichang 615000, China.
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Zhonghua Yu Fang Yi Xue Za Zhi. 2015 Nov;49(11):1014-6.