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Cost effective approach for emergency department investigation of deep vein thrombosis
  1. R Sinharay,
  2. F Pressley
  1. Department of General Internal Medicine, Royal Gwent Hospital, Cardiff Road, Newport NP20 2UB, UK;

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    I read with interest the paper by Kilroy et al.1 Wells’ criteria of pretest probability (PTP) has recently been validated in a large randomised control trial2 for excluding pulmonary embolism. Kilroy et al1 admit that using PTP the risk stratification was successful, it was not quite as discriminatory as Wells’ original data.

    Wells’ study2 has important implications for practice because …

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