RT Journal Article SR Electronic T1 Comparative Clinical Haematology JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 606 OP 606 DO 10.1136/jcp.31.6.606-b VO 31 IS 6 A1 E. Cotchin YR 1978 UL http://jcp.bmj.com/content/31/6/606.2.abstract AB