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. 2016 May 23;6:26120. doi: 10.1038/srep26120

Figure 4. ROC curves of each potential biomarker (A: carbamic acid, monoammonium salt, B: l-alanine ethylamide, (S)-, C: guanidine, N,N-dimethyl-, D: phosphonic acid, (p-hydroxyphenyl)-) and the combined index, with AUC and 95% confidence intervals.

Figure 4

The straight line represents an AUC of 0.5.