After publication of the original article , we were notified that units of testosterone in main text and abstract and units of DHEA-S in Fig. 1 and Table 4 are incorrect. 1. In the Abstract: 'testosterone (0.230 ng/L vs. 0.250 ng/L, p = 0.005)' should be replaced with 'testosterone (0.230 ng/mL vs. 0.250 ng/mL, p = 0.005)' 2. In the section 'Serum levels of sex hormones': 'testosterone (0.23 ng/L vs. 0.25 ng/L, p = 0.005)' should be replaced with 'testosterone (0.23 ng/mL vs. 0.25 ng/mL, p = 0.005)' 3. The unit of serum DHEA-S, in Fig. 1 (3rd column): 'μg/mL' should be replaced with 'μg/dL' 4. unit of DHEA-S in Table 4 (4th row): 'μg/mL' should be replaced with 'μg/dL'.
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