PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/ebm.6.5.131 DP - 2001 Sep 01 TA - Evidence Based Medicine PG - 131--131 VI - 6 IP - 5 4099 - http://ebm.bmj.com/content/6/5/131.short 4100 - http://ebm.bmj.com/content/6/5/131.full SO - Evid Based Med2001 Sep 01; 6