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Old 01-30-2013, 08:47 AM   #26
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Spencer Larsen

Originally Posted by bronco militia View Post
I read that it is only detectable with a blood test and the NFL is only allowed under the new CBA to perform urine tests.
I think that is the case with most of these naturally occurring hormones, you can only detect the levels by blood test to determine if they are present at levels above what is considered normal. It is the same with HGH and EPO.
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