-
Fetal right ventricular contraction and relaxation times at 11-13 weeks' gestation by speckle tracking imaging.
Persico N, Fabietti I, Baffero G, Fedele L, Nicolaides KH.
Ultrasound Obstet Gynecol 2014;43:284-90. pdf -
Prenatal diagnosis of triploidy during the second trimester of pregnancy.
Jauniaux E, Brown R, Rodeck C, Nicolaides KH.
Obstet Gynecol 1996;88:983-9.