RT Journal Article SR Electronic T1 How hospitals can protect themselves from cyber attack JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E101 OP E102 DO 10.1503/cmaj.1095841 VO 192 IS 4 A1 Brian Owens YR 2020 UL http://www.cmaj.ca/content/192/4/E101.abstract AB