The newspapers in recent years have been filled with stories about professional athletes using - or alleged to have used - drugs such as anabolic steroids and human growth hormone to get a competitive edge, From Roger Clemens to Barry Bonds, from Olympic gold medalist Marion Jones to 2006 Tour de France winner Floyd Landis. The federal Centers for Disease Control and Prevention (CDC) reported in 2003 that 850,000 high school students admitted to using anabolic steriods.