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The recognition of Hageman deficiency in blood donors
  1. W. L. Marsh,
  2. W. J. Jenkins
  1. North-East Metropolitan Regional Blood Transfusion Centre, Brentwood, Essex


    The laboratory findings on a blood donor whose blood coagulation time was greatly prolonged are described. The defect was caused by a deficiency of Hageman (contact) factor, the nature of the defect being demonstrated by a simple glass adsorption test using normal serum.

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