Cross-sectional and longitudinal evaluation of uterine artery Doppler velocimetry for the prediction of pre-eclampsia in normotensive women with specific risk factors. - Parretti, E.; Mealli, F.; Magrini, A.; Cioni, R.; Mecacci, F.; La Torre, P.; Periti, E.; Scarselli, C.; Mello, G. (Ultrasound in Obstetrics & Gynecology, 2003)