TY - JOUR T1 - THE SI FOR THE HEALTH PROFESSIONS JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 633 LP - 633 VL - 28 IS - 195 AU - D. J. Pereira Gray Y1 - 1978/10/01 UR - http://bjgp.org/content/28/195/633.3.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -