TY - JOUR T1 - Correction JF - Canadian Medical Association Journal JO - CMAJ SP - 980 LP - 980-b DO - 10.1503/cmaj.050305 VL - 172 IS - 8 AU - , Y1 - 2005/04/12 UR - http://www.cmaj.ca/content/172/8/980.3.abstract ER -