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The aim of this study was to evaluate the activity and toxicity of a double biochemical modulation of 5-fluorouracil (5-FU) by means of methotrexate (MTX) and levo-folinic acid (LFA) in patients with advanced carcinoma of the digestive tract, and to assess the prognostic significance of MTX serum concentrations achieved in these patients. 94 patients affected by advanced carcinoma of the colonrectum,...
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