PT - JOURNAL ARTICLE AU - , TI - Query AID - 10.1503/cmaj.050221 DP - 2005 Apr 12 TA - Canadian Medical Association Journal PG - 1144--1144 VI - 172 IP - 8 4099 - http://www.cmaj.ca/content/172/8/1144.short 4100 - http://www.cmaj.ca/content/172/8/1144.full SO - CMAJ2005 Apr 12; 172