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First trimester maternal serum free beta human chorionic gonadotrophin and pregnancy associated plasma protein A as predictors of pregnancy complications.
Ong CY, Liao AW, Spencer K, Munim S, Nicolaides KH.
BJOG 2000;107:1265-70. -
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.