Screening with uterine Doppler in low risk pregnant women followed by low dose aspirin in women with abnormal results: a multicenter randomised controlled trial. - Goffinet,F.; Aboulker,D.; Paris-Llado,J.; Bocourt,M.; Uzan,M.; Papiernik,E.; Breart,G. (B J Obstet Gynaecol, 2001)