RT Journal Article SR Electronic T1 Dr Rowlands comments JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 783 OP 784 DO 10.1136/jcp.42.7.783 VO 42 IS 7 YR 1989 UL http://jcp.bmj.com/content/42/7/783.abstract AB