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 Gerben ter Riet, MD PhD A1 Jeltsje S. Cnossen MD A1 Joris A.M. van der Post, MD PhD A1 Ben W. Mol, MD PhD A1 Rachel K. Morris MD A1 Khalid S. Khan MD YR 2008 UL http://www.cmaj.ca/content/179/1/53.2.abstract