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One-stage screening for pregnancy complications by color doppler assessment of the uterine arteries at 23 weeks' gestation.
Albaiges G, Missfelder-Lobos H, Lees C, Parra M, Nicolaides KH.
Obstet Gynecol 2000;96:559-64. -
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.