RT Journal Article SR Electronic T1 Three heart medications in short supply in Canada JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E167 OP E168 DO 10.1503/cmaj.109-4723 VO 186 IS 5 A1 Laura Eggertson YR 2014 UL http://www.cmaj.ca/content/186/5/E167.abstract AB