PT - JOURNAL ARTICLE AU - Daniel Hackam TI - No absolutes DP - 2003 Sep 30 TA - Canadian Medical Association Journal PG - 651--651-a VI - 169 IP - 7 4099 - http://www.cmaj.ca/content/169/7/651.2.short 4100 - http://www.cmaj.ca/content/169/7/651.2.full SO - CMAJ2003 Sep 30; 169