TY - JOUR T1 - Query JF - Canadian Medical Association Journal JO - CMAJ SP - 816 LP - 816 DO - 10.1503/cmaj.1040331 VL - 171 IS - 7 A2 - , Y1 - 2004/09/28 UR - http://www.cmaj.ca/content/171/7/816.abstract ER -