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As to the validity and accuracy of the test, scientists say there’s no such thing as 100 percent certainty in this field and the 99.99 percent accuracy rate the HGH test boasts is better than most tests, which is why it has been on the market for seven years.

“When you’ve got a false positive rate of 1 in 10,000, that’s about as good as you can ask for,” Baumann said. “It’s very much stacked in favor of not having any false positives.”

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AP Sports Writers Stephen Wilson in London, Howard Fendrich in Washington, Larry Lage in Detroit and Steven Wine in Miami contributed to this report.