TY - JOUR T1 - James Mackenzie. JF - British Journal of General Practice JO - Br J Gen Pract SP - 262 LP - 263 VL - 43 IS - 371 AU - J McCormick Y1 - 1993/06/01 UR - http://bjgp.org/content/43/371/262.4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -