RT Journal Article SR Electronic T1 Limitations of the Wilcoxon matched pairs signed ranks test for comparison studies JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 783 OP 783 VO 57 IS 7 A1 Twomey, P J A1 Viljoen, A YR 2004 UL http://jcp.bmj.com/content/57/7/783.1.abstract AB