Allow Chael Sonnen to educate you on the benefits of erythropoietin, more commonly known as EPO. Sonnen, a former three-time UFC title challenger, never has been shy to elaborate on his experience with taking performance-enhancing drugs. Sonnen, 44, tested positive for anastrozole, clomifene, human chorionic gonadotropin (hCG), human growth hormone (HGH) and EPO, which Saturday’s headliner T.J. Dillashaw also recently served time for
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