Re: Prediction of early- and late-onset pregnancy-induced hypertension using placental volume on three-dimensional ultrasound and uterine artery Doppler. T. Arakaki, J. Hasegawa, M. Nakamura, S. Hamada, M. Muramoto, H. Takita, K. Ichizuka and A. Sekizawa. Ultrasound Obstet Gynecol 2015; 45: 539–543