RT Journal Article SR Electronic T1 Unnecessary repeat requesting of tests in a university teaching hospital immunology laboratory: an audit JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 78 OP 78 VO 55 IS 1 A1 A P Huissoon A1 S A Carlton YR 2002 UL http://jcp.bmj.com/content/55/1/78.2.abstract AB