RT Journal Article SR Electronic T1 Disclosing errors that affect multiple patients JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1125 OP 1127 DO 10.1503/cmaj.081016 VO 180 IS 11 A1 Roger Chafe A1 Wendy Levinson A1 Terrence Sullivan YR 2009 UL http://www.cmaj.ca/content/180/11/1125.abstract