PT - JOURNAL ARTICLE ED - , TI - Erratum AID - 10.1136/pgmj.69.808.169-b DP - 1993 Feb 01 TA - Postgraduate Medical Journal PG - 169--169 VI - 69 IP - 808 4099 - http://pmj.bmj.com/content/69/808/169.3.short 4100 - http://pmj.bmj.com/content/69/808/169.3.full SO - Postgrad Med J1993 Feb 01; 69