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Salivary aldolase activity. Receiver operating characteristic (ROC) analysis for discriminating between animals with EGUS from healthy ones (left) and EGUS from other gastrointestinal diseases (right). AUC, the area under the curve (95% confidence interval within parenthesis); Sens, sensitivity; Spec, specificity; LR, likelihood ratio. Statistical analysis: **: p < 0.01; ns: p > 0.05).
