PT - JOURNAL ARTICLE ED - , AID - 10.1136/heart.86.6.708 DP - 2001 Dec 01 TA - Heart PG - 708--708 VI - 86 IP - 6 4099 - http://heart.bmj.com/content/86/6/708.short 4100 - http://heart.bmj.com/content/86/6/708.full SO - Heart2001 Dec 01; 86