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Representative fluorescence spectra of synthetic tissue phantoms with various redox ratio (RR) values. The legends give the exact redox ratio values in a floating-point format. For example, RR=2.20e-003 represents an redox ratio value of 2.20×10−3. Note that the fluorescence spectra have been smoothed out by applying “smooth” function with the option of “rlowess” in Matlab 7.5.
