TY - JOUR T1 - Correction JF - Canadian Medical Association Journal JO - CMAJ SP - 617 LP - 617-b DO - 10.1503/cmaj.109-2030 VL - 181 IS - 9 A2 - , Y1 - 2009/10/27 UR - http://www.cmaj.ca/content/181/9/617.3.abstract ER -