TY - JOUR T1 - Erratum JF - Clinical Medicine JO - Clin Med SP - 495 LP - 495 DO - 10.7861/clinmedicine.9-5-495 VL - 9 IS - 5 A2 - , Y1 - 2009/10/01 UR - http://www.rcpjournals.org/content/9/5/495.abstract ER -