RT Journal Article SR Electronic T1 Current understanding of the pathophysiology of thrombotic thrombocytopenic purpura JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 497 OP 501 DO 10.1136/jcp.53.7.497 VO 53 IS 7 A1 S L Allford A1 S J Machin YR 2000 UL http://jcp.bmj.com/content/53/7/497.abstract AB