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Comparison of color Doppler uterine artery indices in a population at high risk for adverse outcome at 24 weeks' gestation.
Albaiges G, Missfelder-Lobos H, Parra M, Lees C, Cooper D, Nicolaides KH.
Ultrasound Obstet Gynecol 2003;21:170-3. -
Assessment of umbilical arterial and venous flow using color Doppler.
Lees C, Albaiges G, Deane C, Parra M, Nicolaides KH.
Ultrasound Obstet Gynecol 1999;14:250-5.