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Receiver operating characteristics curve for determining the efficacy of the spectrometry for talaporfin sodium. The specificity and sensitivity were 0.80 and 0.71, respectively, when the fluorescence intensity threshold was set at 10,853 (arbitrary units) for discriminating samples of histopathological class 0, defined as tumor-negative. Area under the curve (AUC) = 0.792, 95% confidence interval: 0.672–0.912.
