RT Journal Article SR Electronic T1 Use of Doppler ultrasonography to predict pre-eclampsia JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 53 OP 54 DO 10.1503/cmaj.1080051 VO 179 IS 1 A1 ter Riet, Gerben A1 Cnossen, Jeltsje S. A1 van der Post, Joris A.M. A1 Mol, Ben W. A1 Morris, Rachel K. A1 Khan, Khalid S. YR 2008 UL http://www.cmaj.ca/content/179/1/53.2.abstract