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FILE - In this May 15, 2015 file photo, one of Russia's top sport scientists, Sergei Portugalov of the Federal Scientific Center for Physical Culture and Sport, poses in Moscow, Russia. The Russian sports doctor accused of supplying performance-enhancing drugs to athletes has been banned for life. The Court of Arbitration for Sports said "clear evidence" of multiple offences justified the ban for Sergei Portugalov, who was medical director for the now-suspended Russian track and field federation. (Aleksander Chernykh/Russia Photo News via AP)

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FILE - In this May 15, 2015 file photo, one of Russia's top sport scientists, Sergei Portugalov of the Federal Scientific Center for Physical Culture and Sport, poses in Moscow, Russia. The Russian sports doctor accused of supplying performance-enhancing drugs to athletes has been banned for life. The Court of Arbitration for Sports said "clear evidence" of multiple offences justified the ban for Sergei Portugalov, who was medical director for the now-suspended Russian track and field federation. (Aleksander Chernykh/Russia Photo News via AP)

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