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The governing body of world athletics has fiercely denied claims made in The Sunday Times that it blocked the publication of research that showed a third of top athletes had admitted cheating.
ITV News's Peter Smith reports:
World athletics' governing body has dismissed newspaper claims it blocked a 2011 doping study that allegedly revealed a third of top athletes had admitted cheating.
In response to the Sunday Times report, the International Association of Athletics Federations (IAAF) said: "This is not a new story, having first been raised on German TV in 2013, and those concerns were addressed by the IAAF at the time."
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A study allegedly revealing a third of 1,800 top athletes admitted cheating was suppressed by the IAAF, The Sunday Times has reported.