PT - JOURNAL ARTICLE AU - Schünemann, Holger J. AU - Best, Dana AU - Vist, Gunn AU - Oxman, Andrew D. TI - Grading evidence AID - 10.1503/cmaj.1040014 DP - 2004 Mar 16 TA - Canadian Medical Association Journal PG - 929--930 VI - 170 IP - 6 4099 - http://www.cmaj.ca/content/170/6/929.short 4100 - http://www.cmaj.ca/content/170/6/929.full SO - CMAJ2004 Mar 16; 170