RT Journal Article SR Electronic T1 Tissue artefacts caused by sponges. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 286 OP 287 DO 10.1136/jcp.47.3.286-c VO 47 IS 3 A1 A M Davison A1 A R Morley YR 1994 UL http://jcp.bmj.com/content/47/3/286.3.abstract AB