RT Journal Article SR Electronic T1 Introduction JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 1.b1 OP 1.b1 DO 10.1136/jcp.s1-3.1.1.b1 VO s1-3 IS 1 A1 Merton Sandler A1 Barbara Billing YR 1969 UL http://jcp.bmj.com/content/s1-3/1/1.b1.abstract AB