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Article
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Screening for Down syndrome using first-trimester combined screening followed by second-trimester ultrasound examination in an unselected population
Patrick Rozenberg et al.
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY (2006)
Article
Obstetrics & Gynecology
Beyond race or ethnicity and socioeconomic status - Predictors of prenatal testing for Down syndrome
Miriam Kuppermann et al.
OBSTETRICS AND GYNECOLOGY (2006)