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A circulating anticoagulant inhibiting antihaemophilic globulin (A.H.G.) is described in an otherwise healthy 70-year-old woman, and the therapeutic response to steroids is discussed. The nature and pathogenesis of the anticoagulant remain obscure, but its properties and behaviour do not support an autoimmune aetiology.
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Pinkerton et al. (1965) studied this question.
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