Early first-trimester maternal serum placental growth factor in trisomy 21 pregnancies

Author: Cowans N. J.   Stamatopoulou A.   Tørring N.   Spencer K.  

Publisher: John Wiley & Sons Inc

ISSN: 1469-0705

Source: Ultrasound in Obstetrics and Gynecology, Vol.37, Iss.5, 2011-05, pp. : 515-519

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