PT - JOURNAL ARTICLE ED - , TI - WEB TOP 10 AID - 10.1136/heart.89.7.709 DP - 2003 Jul 01 TA - Heart PG - 709--709 VI - 89 IP - 7 4099 - http://heart.bmj.com/content/89/7/709.short 4100 - http://heart.bmj.com/content/89/7/709.full SO - Heart2003 Jul 01; 89