PT - JOURNAL ARTICLE ED - , TI - WEB TOP 10 AID - 10.1136/heart.89.3.336 DP - 2003 Mar 01 TA - Heart PG - 336--336 VI - 89 IP - 3 4099 - http://heart.bmj.com/content/89/3/336.short 4100 - http://heart.bmj.com/content/89/3/336.full SO - Heart2003 Mar 01; 89