RT Journal Article SR Electronic T1 Quality Control and Assurance in Clinical Laboratories: Three Years On JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 221 OP 221 DO 10.1136/jcp.42.2.221-d VO 42 IS 2 A1 Cavill, IAJ YR 1989 UL http://jcp.bmj.com/content/42/2/221.4.abstract AB