TY - JOUR T1 - Clinical Medicine JF - Clinical Medicine JO - Clin Med SP - 667 LP - 669 DO - 10.7861/clinmedicine.5-6-667 VL - 5 IS - 6 A2 - , Y1 - 2005/11/01 UR - http://www.rcpjournals.org/content/5/6/667.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -