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Table 2. Apoptotic indexes in control (6 months) and photoinhibited hamsters*

	Control	Photoinhibited

Total apoptotic index (SG+SC)	0.77 ± 0.03	2.84 ± 0.16 ${dagger}$
Apoptotic index in SG	0.24 ± 0.03	0.76 ± 0.17 ${ddagger}$
Apoptotic index in SC	0.19 ± 0.01	2.62 ± 0.28 ${dagger}$

*Values represent mean ± SEM. SG indicates spermatogonia; SC, spermatocytes.
${dagger}$ Significant differences between control group and aged hamsters (P < .05).
${ddagger}$ No significant differences between groups.