TY - JOUR T1 - ASH JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 686 LP - 686 VL - 21 IS - 112 AU - G. I. Watson Y1 - 1971/11/01 UR - http://bjgp.org/content/21/112/686.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -