RT Journal Article SR Electronic T1 Progress in Clinical Parasitology JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 699 OP 699 DO 10.1136/jcp.43.8.699-d VO 43 IS 8 A1 Lucas, S YR 1990 UL http://jcp.bmj.com/content/43/8/699.4.abstract AB