RT Journal Article SR Electronic T1 Adverse events: past and future JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 549 OP 549-a DO 10.1503/cmaj.1040765 VO 171 IS 6 A1 John Ruedy A1 Richard I. Ogilvie YR 2004 UL http://www.cmaj.ca/content/171/6/549.2.abstract