TY - JOUR T1 - QUERY JF - Canadian Medical Association Journal JO - CMAJ SP - 912 LP - 912 DO - 10.1503/cmaj.1031970 VL - 170 IS - 5 A2 - , Y1 - 2004/03/02 UR - http://www.cmaj.ca/content/170/5/912.abstract ER -