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Percentages detected for each bile acid following model predictions performed on surface-enhanced Raman spectroscopy measurements of single-species solutions of TCDCA, LCA, and DCA at different concentrations (10, 25, 50, and 100 µM). A total of 300 spectra were measured for each concentration. The percentages are averages over the results obtained with 10 independent versions of the trained model and the error bars correspond to the calculated standard deviation.
