TY - JOUR T1 - The authors comment JF - Journal of Clinical Pathology JO - J Clin Pathol SP - 414 LP - 415 DO - 10.1136/jcp.33.4.414 VL - 33 IS - 4 AU - C Birch AU - A Hawker AU - J Marshall AU - I Gust Y1 - 1980/04/01 UR - http://jcp.bmj.com/content/33/4/414.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -