Australian scientists Michael Ashenden and Robin Parisotto have claimed hundreds of athletes had returned "suspicious" doping test results.
Their allegation was based on the examination of a leaked database provided to them by Britain's Sunday Times newspaper and German broadcaster ARD containing more than 12,000 blood tests from 5,000 athletes between 2001 and 2012.
This week the IAAF robustly denied any negligence in its testing procedure in an affair that has marred the build-up to this month's world championships in Beijing.
"Of most concern to us is that the two scientists continue to defend their statements that the IAAF did nothing to act on "suspicious profiles".
"And that the scientists also continue to believe that they were in a position to make this analysis based on their background and involvement in a number of Athlete Biological Passport (ABP) cases related to the sport of athletics," the IAAF contended.
According to the IAAF, Ashenden and Parisotto "also conveniently ignore the fact that more than 60 athletes have been sanctioned on the basis of abnormal blood values collected after 2009."
"More importantly, they do not have access to the IAAF testing records and are therefore not able to know whether proper testing follow-up was conducted by the IAAF.
