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Fig 2. [11C]Methionine maximum uptake index as a function of grading. Grading values are regrouped as indicated in the text. Grade 0' (benign) and grade I' (WHO grade I and intermediate grade I–II) show significantly reduced uptake compared with grade II'–IV' lesions. Box plots show the mean value, and whiskers show the 95% confidence interval limits. Boxes show 1 SE; whiskers show the 95% confidence interval limits.
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