RT Journal Article SR Electronic T1 Practical Haematology JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 293 OP 294 DO 10.1136/jcp.3.3.293 VO 3 IS 3 A1 Signy, A. Gordon YR 1950 UL http://jcp.bmj.com/content/3/3/293.abstract AB