RT Journal Article SR Electronic T1 Clinical utility of anti-Xa monitoring and differential sensitivity of prothrombin time assays: an illustrated case report JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 318 OP 319 DO 10.1136/jclinpath-2014-202748 VO 68 IS 4 A1 Hein Than A1 Joanna Bao Ern Loh A1 Christina Lai Lin Sum A1 Heng Joo Ng YR 2015 UL http://jcp.bmj.com/content/68/4/318.abstract AB