RT Journal Article SR Electronic T1 CORRECTIONS JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 260 OP 260 DO 10.1136/jcp.18.2.260-d VO 18 IS 2 YR 1965 UL http://jcp.bmj.com/content/18/2/260.4.abstract AB