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机构:
Sun Yat Sen Univ, Affiliated Hosp 1, Dept Obstet & Gynecol, Fetal Med Ctr, Guangzhou 510080, Guangdong, Peoples R China
Guangzhou Med Univ, Affiliated Hosp 2, Dept Obstet & Gynecol, Guangzhou, Guangdong, Peoples R China Sun Yat Sen Univ, Affiliated Hosp 1, Dept Obstet & Gynecol, Fetal Med Ctr, Guangzhou 510080, Guangdong, Peoples R China