PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1136/hrt.67.2.209-a DP - 1992 Feb 01 TA - British Heart Journal PG - 209--209 VI - 67 IP - 2 4099 - http://heart.bmj.com/content/67/2/209.short 4100 - http://heart.bmj.com/content/67/2/209.full SO - Heart1992 Feb 01; 67