Cuba's Yarelys Barrios, who placed second in the discus in Beijing, tested positive for the masking agent acetazolamide, according to a re-analysis by the IOC.
Samuel Adelebari Francis of Qatar, who was sixteenth in the 100 metres event, was disqualified after the IOC's re-analysis resulted in a positive test for the steroid stanozol.
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(Reporting by John Miller; Editing by Michael Shields)
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