RT Journal Article SR Electronic T1 Canadian drug shortage: recent history of a mystery JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP cmaj.120527 DO 10.1503/cmaj.120527 A1 Duffin, Jacalyn YR 2012 UL http://www.cmaj.ca/content/early/2012/04/23/cmaj.120527.abstract AB