PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/ebmed-2012-100723 DP - 2015 Feb 01 TA - Evidence Based Medicine PG - 34--34 VI - 20 IP - 1 4099 - http://ebm.bmj.com/content/20/1/34.2.short 4100 - http://ebm.bmj.com/content/20/1/34.2.full SO - Evid Based Med2015 Feb 01; 20