PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/heartjnl-2012-170241 DP - 2012 Jul 15 TA - Heart PG - 1108--1108 VI - 98 IP - 14 4099 - http://heart.bmj.com/content/98/14/1108.2.short 4100 - http://heart.bmj.com/content/98/14/1108.2.full SO - Heart2012 Jul 15; 98