TY - JOUR T1 - Corrigendum JF - British Journal of General Practice JO - Br J Gen Pract SP - 172 LP - 172 VL - 41 IS - 345 A2 - , Y1 - 1991/04/01 UR - http://bjgp.org/content/41/345/172.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -