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Oxford University Press‎(2005)‎

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By Ning Y.   Williams M. A.   Dempsey J. C.   Sorensen T. K.   Frederick I. O.   Luthy D. A.   in Journal of Maternal-Fetal and Neonatal Medicine

ISSN:1476-4954|13|6|385-393

Informa Healthcare‎(2003)‎

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