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Learning curve for Doppler assessment of ductus venosus flow at 11 + 0 to 13 + 6 weeks' gestation.
Maiz N, Kagan KO, Milovanovic Z, Celik E, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;31:503-6. -
Screening for adverse pregnancy outcome by ductus venosus Doppler at 11-13+6 weeks of gestation.
Maiz N, Valencia C, Emmanuel EE, Staboulidou I, Nicolaides KH.
Obstet Gynecol 2008;112:598-605.