RT Journal Article SR Electronic T1 Clinical Chemistry. 5th Edition JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 224 OP 224 VO 58 IS 2 A1 Crook, Martin YR 2005 UL http://jcp.bmj.com/content/58/2/224.2.abstract AB