PT - JOURNAL ARTICLE ED - , TI - Correction DP - 2007 Feb 01 TA - British Journal of General Practice PG - 156--156 VI - 57 IP - 535 4099 - http://bjgp.org/content/57/535/156.2.short 4100 - http://bjgp.org/content/57/535/156.2.full SO - Br J Gen Pract2007 Feb 01; 57