RT Journal Article SR Electronic T1 Standardization of clinical enzyme assays. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 458 OP 459 DO 10.1136/jcp.26.6.458 VO 26 IS 6 A1 J King A1 A R Henderson YR 1973 UL http://jcp.bmj.com/content/26/6/458.abstract AB