PT - JOURNAL ARTICLE AU - Bronson, Richard TI - Imperfect knowledge AID - 10.1503/cmaj.081256 DP - 2008 Sep 09 TA - Canadian Medical Association Journal PG - 563--563 VI - 179 IP - 6 4099 - http://www.cmaj.ca/content/179/6/563.short 4100 - http://www.cmaj.ca/content/179/6/563.full SO - CMAJ2008 Sep 09; 179