TY - JOUR T1 - CORRECTION JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 457 LP - 457 VL - 26 IS - 167 A2 - , Y1 - 1976/06/01 UR - http://bjgp.org/content/26/167/457.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -