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. 2017 Oct 17;6(10):e007074. doi: 10.1161/JAHA.117.007074

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© 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Serum testosterone and body weight in aging rats. A, Endogenous serum testosterone levels decrease with age in male SHR, (n=6/group). *P<0.05 compared with rats aged 3 and 5 mo; ^# P<0.05, compared with rats, aged 7 to 14 mo; ^$ P<0.05, compared with rats aged 18 mo. B, Body weight increases with aging until 18 mo of age or later (n=6/group). *P<0.05, compared with rats, aged 3 mo; ^# P<0.05 compared with rats aged 5 mo; ^$ P<0.05, compared with rats, aged 7–12 mo; ^@ P<0.05 vs 14 mo; ^& P<0.05 vs 18 mo. SHR indicates spontaneously hypertensive rats.