PT - JOURNAL ARTICLE ED - , TI - Attempts to identify culprits may not be in "vein" DP - 1997 Feb 01 TA - Canadian Medical Association Journal PG - 340--340 VI - 156 IP - 3 4099 - http://www.cmaj.ca/content/156/3/340.2.short 4100 - http://www.cmaj.ca/content/156/3/340.2.full SO - CMAJ1997 Feb 01; 156