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ROC analyses. Cows with subclinical mastitis can be distinguished from healthy controls with a sensitivity of 0.76 and a specificity of 0.62 at a cut-off of 122.4 pg/mL in serum (A). The area under the curve is 0.73. In milk at a cut-off of 89.9 pg/mL sensitivity of 0.83 and a specificity of 0.72 was calculated. The area under the curve is 0.76 (B).
