RT Journal Article SR Electronic T1 The Common Causes of Lymphopenia JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 321 OP 331 DO 10.1136/jcp.3.4.321 VO 3 IS 4 A1 A. J. Shillitoe YR 1950 UL http://jcp.bmj.com/content/3/4/321.abstract AB