PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1136/ebm.1996.1.135 DP - 1996 Aug 01 TA - Evidence Based Medicine PG - 135--135 VI - 1 IP - 5 4099 - http://ebm.bmj.com/content/1/5/135.short 4100 - http://ebm.bmj.com/content/1/5/135.full SO - Evid Based Med1996 Aug 01; 1