TY - JOUR T1 - Briefly JF - Canadian Medical Association Journal JO - CMAJ SP - E535 LP - E538 DO - 10.1503/cmaj.109-4226 VL - 184 IS - 10 A2 - , Y1 - 2012/07/10 UR - http://www.cmaj.ca/content/184/10/E535.abstract ER -