RT Journal Article SR Electronic T1 Population screening JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 145 OP 149 DO 10.1136/jcp.s3-8.1.145 VO s3-8 IS 1 A1 Barbara E. Clayton YR 1974 UL http://jcp.bmj.com/content/s3-8/1/145.abstract AB