Recommendations for clinical laboratory testing for antithrombin deficiency; Communication from the SSC of the ISTH

Hereditary deficiency of antithrombin, a natural anticoagulant, causes a thrombophilia with a high risk for venous thromboembolism. Guidance for laboratory testing to diagnose antithrombin deficiency include the use of an activity assay for initial testing, performing an antigen test and activity‐to...

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