TY - JOUR T1 - Correction: Research JF - Canadian Medical Association Journal JO - CMAJ SP - 65 LP - 65-c DO - 10.1503/cmaj.110-2011 VL - 182 IS - 1 A2 - , Y1 - 2010/01/12 UR - http://www.cmaj.ca/content/182/1/65.4.abstract ER -