Second-trimester ultrasound markers for detection of trisomy 21: Which markers are best?

Vintzileos, Anthony M. ; Campbell, Winston A. ; Guzman, Edwin R. ; Smulian, John C. ; Mclean, David A. ; Ananth, Cande V.

Obstetrics and gynecology (New York. 1953), 1997-06, Vol.89 (6), p.941-944 [Periódico revisado por pares]

New York, NY: Elsevier Inc

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