RT Journal Article SR Electronic T1 Microbiological Methods JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 351 OP 352 DO 10.1136/jcp.43.4.351-e VO 43 IS 4 A1 Sleigh, JD YR 1990 UL http://jcp.bmj.com/content/43/4/351.5.abstract AB