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RE: Solomon suddenly world class and Rupp soloing 3.50 indoor miles - Come on Letsun, ask the questions!

agip wrote:
Due to its history of false positives, especially among older female athletes, the (T/E) ratio test has since been revised and laboratories now also run a carbon isotope ratio test (CIR) if the ratio is unusually high.[14]

If you look at the annotated link [14], nowhere does it say that there was a history of false positives, only that the carbon isotope ratio test is more accurate hence the 4:1 ratio as compared to the old 6:1 ratio.

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