RT Journal Article SR Electronic T1 Dr Davies et al comment JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 893 OP 893 DO 10.1136/jcp.42.8.893-c VO 42 IS 8 A1 Davies, JD A1 Armstrong, J A1 Paterson, DA YR 1989 UL http://jcp.bmj.com/content/42/8/893.3.abstract AB