After that, the International Olympic Committee led efforts to create an independent agency to set and enforce common anti-doping rules.

VOA: special.2011.04.12

Anti-doping officials say they want to protect the integrity of sports by guaranteeing what they call a level playing field.

VOA: special.2011.04.12

You know there are a lot of ways to dope that are still cutting-edge compared to the anti-doping technology that we have."

VOA: special.2011.04.12

The White House Office of National Drug Control Policy provided a statement about sports doping to VOA.

VOA: special.2011.04.12

By the nineteen-twenties, sports organizations were attempting to stop the use of doping substances.

VOA: special.2011.04.12

David Epstein writes about sports doping for Sports Illustrated magazine.

VOA: special.2011.04.12