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Receiver operator characteristic (ROC) curve for serum and fecal biomarkers: fecal calprotectin (FC) (a), C-reactive protein (CRP) (b), erythrocyte sedimentation rate (ESR) (c), seromucoid (AAG) (d) and procalcitonin (PCT) (e) in the differentiation of Crohn’s disease in children with non-inflammatory diseases of the gastrointestinal tract.
