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机构:
Sichuan Univ, West China Univ Hosp 2, Dept Gynecol & Obstet, Chengdu 610041, Sichuan, Peoples R China
Sichuan Univ, West China Hosp 2, Key Lab Obstet & Gynecol & Pediat Dis & Birth Def, Minist Educ, Chengdu 610041, Sichuan, Peoples R China
Zunyi Med Univ, Dept Obstet & Gynecol, Affiliated Hosp 1, Zunyi 563000, Guizhou, Peoples R China Sichuan Univ, West China Univ Hosp 2, Dept Gynecol & Obstet, Chengdu 610041, Sichuan, Peoples R China