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The world's top sports court overturned lifetime Olympic bans on 39 Russian athletes for doping violations following the 2014 Sochi Olympic Games. The Lausanne-based Court of Arbitration for Sport (CAS) also said on Thursday that 28 of the athletes have had all their bans lifted and their results reinstated, reports Xinhua news agency. The CAS said it was upholding the appeals from 28 out of the 39 Russian athletes given lifetime bans by the International Olympic Committee (IOC) for doping violations at the Sochi Games.