RT Journal Article SR Electronic T1 Waiting for medicine’s black swans JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E246 OP E247 DO 10.1503/cmaj.109-4135 VO 184 IS 5 A1 Doyle, Sabrina YR 2012 UL http://www.cmaj.ca/content/184/5/E246.abstract