TY - JOUR T1 - Churchill JF - Clinical Medicine JO - Clin Med SP - 78 LP - 78 DO - 10.7861/clinmedicine.2-1-78 VL - 2 IS - 1 AU - Douglas Black Y1 - 2002/01/01 UR - http://www.rcpjournals.org/content/2/1/78.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -