At the championships the IAAF collected blood samples from all participating athletes, following the procedure introduced at the 2011 World Championships in Athletics, in line with supporting its Athlete Biological Passport programme. This assisted the federation in detecting athlete's potential usage of banned substances, including steroids, human growth hormone, EPO and blood doping. In addition to the mandatory blood tests, the IAAF also conducted around 500 urine tests at the championships in three groups: all medallists were subjected to urine tests, those showing biological passport anomalies were targeted, and random urine tests were also applied. Continuing with procedures initiated at the 2005 edition, all urine tests were scheduled for long-term storage to allow retrospective testing in future. All athlete samples were processed at the Moscow Anti-Doping Laboratory accredited by the World Anti-Doping Agency.