RT Journal Article SR Electronic T1 Continuing drug shortages affect North American patients JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E811 OP E812 DO 10.1503/cmaj.109-3712 VO 182 IS 18 A1 Laura Eggertson YR 2010 UL http://www.cmaj.ca/content/182/18/E811.abstract