PT - JOURNAL ARTICLE AU - Alexander C. Tsai TI - Drawing policy conclusions from uncontrolled studies DP - 2004 Feb 03 TA - Canadian Medical Association Journal PG - 317--317 VI - 170 IP - 3 4099 - http://www.cmaj.ca/content/170/3/317.1.short 4100 - http://www.cmaj.ca/content/170/3/317.1.full SO - CMAJ2004 Feb 03; 170