TY - JOUR T1 - Query JF - Canadian Medical Association Journal JO - CMAJ SP - 1920 LP - 1920 DO - 10.1503/cmaj.060667 VL - 176 IS - 13 A2 - , Y1 - 2007/06/19 UR - http://www.cmaj.ca/content/176/13/1920.abstract ER -