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First- and Second-Trimester Evaluation of Risk for Down Syndrome
Ball, Robert H., Caughey, Aaron B.Volume:
110
Language:
english
Journal:
Obstetrics & Gynecology
DOI:
10.1097/01.aog.0000296098.31280.c4
Date:
December, 2007
File:
PDF, 453 KB
english, 2007