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Traces overlay for discriminant peaks between fertile and infertile men. MALDI-TOF fingerprints comparison of SP samples between fertile (green) subjects and infertile (red) patients, obtained using Data Explorer software. Spectra overlay in absolute units highlights the peak intensity variation resulted statistically significant for the m/z peaks 2331 and 2362 (A), 2482 (B), 2893 (C), 3059 and 3083 (D), 3938 (E).
