RT Journal Article SR Electronic T1 Major Problems in Internal Medicine JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 1255 OP 1255 DO 10.1136/jcp.31.12.1255-c VO 31 IS 12 A1 MacLennan, I. C. M. YR 1978 UL http://jcp.bmj.com/content/31/12/1255.3.abstract AB