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 Chafe, Roger A1 Levinson, Wendy A1 Sullivan, Terrence YR 2009 UL http://www.cmaj.ca/content/180/11/1125.abstract