I'm sorry but any reasonable person can read the articles provided on this thread an see the difference between them. I trust the word of Travis Tygart (chief exec of the USADA) more than that of obviously bias journalist Kevin Riley (your first article) and some article on new, experimental testing by some company called Ceres Nanosciences (your second).
Travis Tygart: "I think that it's fair to say that there are several, very potent, performance enhancing drugs that only blood can detect, and there is an entirely different method of detecting broader categories of drug use through parameter testing that is done with the blood."
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