PT - JOURNAL ARTICLE ED - , TI - Correction: <em>What does expert opinion in guidelines mean? a meta-epidemiological study</em> AID - 10.1136/ebmed-2017-110798corr1 DP - 2017 Feb 03 TA - BMJ Evidence-Based Medicine PG - e110798corr1 4099 - http://ebm.bmj.com/content/early/2018/02/03/ebmed-2017-110798corr1.short 4100 - http://ebm.bmj.com/content/early/2018/02/03/ebmed-2017-110798corr1.full