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 480 OP 480 DO 10.1136/jcp.37.4.480-d VO 37 IS 4 YR 1984 UL http://jcp.bmj.com/content/37/4/480.4.abstract AB