PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/hrt.2011.223867corr1 DP - 2011 Nov 01 TA - Heart PG - 1812--1812 VI - 97 IP - 21 4099 - http://heart.bmj.com/content/97/21/1812.3.short 4100 - http://heart.bmj.com/content/97/21/1812.3.full SO - Heart2011 Nov 01; 97