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Taiwanese Journal of Obstetrics & Gynecology > 2011 > 50 > 2 > 141-144
Journal of Zhejiang University-SCIENCE B > 2009 > 10 > 8 > 635-638
Taiwanese Journal of Obstetrics & Gynecology > 2011 > 50 > 2 > 141-144
Journal of Zhejiang University-SCIENCE B > 2009 > 10 > 8 > 635-638