RT Journal Article SR Electronic T1 Canadian Adverse Events Study JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 829 OP 829-b DO 10.1503/cmaj.1040919 VO 171 IS 8 A1 Peter J. Zed A1 Richard S. Slavik YR 2004 UL http://www.cmaj.ca/content/171/8/829.3.abstract