TY - JOUR T1 - CORRECTION JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 505 LP - 505 VL - 28 IS - 193 A2 - , Y1 - 1978/08/01 UR - http://bjgp.org/content/28/193/505.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -