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Figure 4: (a) Mean processed spectra for sertoli cell-only (red curve) and active spermatogenesis (blue curve) with 1000 and 1690 cm−1 discriminatory Raman peak intensity, respectively. (b) Representative testicular biopsy shows active spermatogenesis. (c) Representative testicular biopsy shows sertoli cell-only. (b and c), H and E, reduced from ×200. Permission for reproduction obtained from Elsevier Publishing[13]

Figure 4: (a) Mean processed spectra for sertoli cell-only (red curve) and active spermatogenesis (blue curve) with 1000 and 1690 cm<sup>−1</sup> discriminatory Raman peak intensity, respectively. (b) Representative testicular biopsy shows active spermatogenesis. (c) Representative testicular biopsy shows sertoli cell-only. (b and c), H and E, reduced from ×200. Permission for reproduction obtained from Elsevier Publishing<sup>[13]</sup>