RT Journal Article SR Electronic T1 Letter: Heparin in intravenous fluids. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 366 DO 10.1136/jcp.29.4.366-a VO 29 IS 4 A1 Raper, C G A1 Johnson, E YR 1976 UL http://jcp.bmj.com/content/29/4/366.1.abstract AB