TY - JOUR T1 - Correction JF - Canadian Medical Association Journal JO - CMAJ SP - 901 LP - 901 DO - 10.1503/cmaj.071432 VL - 177 IS - 8 A2 - , Y1 - 2007/10/09 UR - http://www.cmaj.ca/content/177/8/901.abstract ER -