Doping claims worry athletics chief John Foley

The newspaper, together with German broadcaster ARD/WDR, obtained leaked data relating to 12,000 blood tests conducted on more than 5,000 athletes, with experts claiming the data showed that more than a third of medals - including 55 golds – awarded at Olympic Games and World Championships between 2001 and 2012 were won by athletes with suspicious tests.
It was further alleged that none of those medals had been taken away by the International Association of Athletics Federations.
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