TY - JOUR T1 - Correction JF - Canadian Medical Association Journal JO - CMAJ SP - 1613 LP - 1613 DO - 10.1503/cmaj.070582 VL - 176 IS - 11 A2 - , Y1 - 2007/05/22 UR - http://www.cmaj.ca/content/176/11/1613.abstract ER -