RT Journal Article SR Electronic T1 Health and Drug Alerts JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1091 OP 1091 DO 10.1503/cmaj.1040417 VO 170 IS 7 A1 Eric Wooltorton YR 2004 UL http://www.cmaj.ca/content/170/7/1091.abstract