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Representative images of selected FTIR parameters and corresponding pixel histograms in a/a and Ay/a specimens for (A) whole proximal femur carbonate:phosphate ratio, and (B) whole proximal femur crystallinity. Scale bars on FTIR images indicate 500 μm. The red curve on each pixel histograms indicates the Gaussian distribution fit, and the white horizontal bar with arrows indicates the FWHM. FWHM = full-width at half-maximum.
