RT Journal Article SR Electronic T1 Listeriosis complicating pregnancy JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 821 OP 822 DO 10.1503/cmaj.090395 VO 181 IS 11 A1 Cheung, Vincent Y.T. A1 Sirkin, Wilma L. YR 2009 UL http://www.cmaj.ca/content/181/11/821.abstract AB