TY - JOUR T1 - Errata JF - Clinical Medicine JO - Clin Med SP - 520 LP - 520 DO - 10.7861/clinmedicine.7-5-520b VL - 7 IS - 5 A2 - , Y1 - 2007/10/01 UR - http://www.rcpjournals.org/content/7/5/520.3.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -