TY - JOUR T1 - CORRECTION JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 708 LP - 708 VL - 22 IS - 123 A2 - , Y1 - 1972/10/01 UR - http://bjgp.org/content/22/123/708.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -