RT Journal Article SR Electronic T1 Correction JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 528 OP 528 DO 10.1136/jcp.2011.090209corr1 VO 64 IS 6 YR 2011 UL http://jcp.bmj.com/content/64/6/528.abstract AB