PT - JOURNAL ARTICLE ED - , TI - Erratum AID - 10.1136/hrt.41.5.631-b DP - 1979 May 01 TA - British Heart Journal PG - 631--631 VI - 41 IP - 5 4099 - http://heart.bmj.com/content/41/5/631.2.short 4100 - http://heart.bmj.com/content/41/5/631.2.full SO - Heart1979 May 01; 41