RT Journal Article SR Electronic T1 Year Book of Pathology and Clinical Pathology. 1990 JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 615 OP 615 DO 10.1136/jcp.44.7.615-b VO 44 IS 7 A1 NK Shinton YR 1991 UL http://jcp.bmj.com/content/44/7/615.2.abstract AB