American Journal of Obstetrics and Gynecology 2004.
《美国产科与妇科学杂志》，2004年。
The research appears in the current online issue of American Journal of Obstetrics and Gynecology.
研究发表在《美国杂志妇产科》网上评论。
The research appears in the current online issue of American Journal of Obstetrics and Gynecology.
研究发表在《美国杂志妇产科》网上评论。
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