RT Journal Article SR Electronic T1 Ovarian cancer screening JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 447 OP 447 DO 10.1503/cmaj.1041644 VO 172 IS 4 A1 Erica L. Eason YR 2005 UL http://www.cmaj.ca/content/172/4/447.1.abstract