RT Journal Article SR Electronic T1 Prenatal DNA test raises both hopes and worries JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 705 OP 706 DO 10.1503/cmaj.090349 VO 180 IS 7 A1 Roger Collier YR 2009 UL http://www.cmaj.ca/content/180/7/705.abstract