TY - JOUR T1 - What nobody is sure about.. JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 505 LP - 507 VL - 24 IS - 144 AU - R. L. Meyrick Y1 - 1974/07/01 UR - http://bjgp.org/content/24/144/505.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -