International Association of Athletics Federations has said that 28 athletes who competed at the 2005 and 2007 World Championships have returned adverse findings from retested samples. According to the world governing body, a large majority of the athletes are retired with very few still active. The IAAF is provisionally suspending them, it said in a statement. If violations are confirmed the IAAF will correct the record books and re-allocate medals as necessary. <br/><br/>However, the IAAF responded by describing allegations of widespread doping in athletics as sensationalist and confusing. The World Anti-Doping Agency's independent commission is investigating the claims. The IAAF, which has been criticised after leaked blood test data was obtained by the Sunday Times and German broadcaster ARD/WDR. None of the 28 can be named yet due to the legal process.