PT - JOURNAL ARTICLE ED - , TI - Correction DP - 2007 Oct 01 TA - British Journal of General Practice PG - 838--838 VI - 57 IP - 543 4099 - http://bjgp.org/content/57/543/838.2.short 4100 - http://bjgp.org/content/57/543/838.2.full SO - Br J Gen Pract2007 Oct 01; 57