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Scientists who conducted a study commissioned by World Athletics in 2017, to try to prove a link between good performance and high testosterone levels, this week published a correction in the British Journal of Sports Medicine. Photo: Michael Dodge / Getty Images
Scientists who conducted a study commissioned by World Athletics in 2017, to try to prove a link between good performance and high testosterone levels, this week published a correction in the British Journal of Sports Medicine. Photo: Michael Dodge / Getty Images

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The reason for this, says sports scientist Ross Tucker, is that the Court of Arbitration for Sport (CAS) already knows that the study was flawed.

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