-
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. -
First-trimester determination of fetal gender by ultrasound.
Efrat Z, Akinfenwa Y, Nicolaides KH.
Ultrasound Obstet Gynecol 1999;13:305-7.