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  • The biological passport works by tracking a range of values over time and building up a profile of how those values vary. If, and I don't know if this is the case for Stannard or not, an athlete is doping when they join the biological passport, then the values will show elements of variance should the athlete then modify or even stop their doping regime. It would take a period of a year or more to be able to see that something has changed and the previous baseline values were, in fact, not a true baseline but distorted by doping.

    It's a very effective tool, but it doesn't immediately show whether a rider has been taking banned substances or using methods, like blood transfusions, that are prohibited.

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