Boonen's cocaine use thrown into confusion

Tom Boonen (Quick Step) warms up ahead of the time trial.

Tom Boonen (Quick Step) warms up ahead of the time trial. (Image credit: Elmar Krings)

Following further analysis of Tom Boonen's hair  samples, expert toxicologists have said that he used only a small amount of cocaine this spring. The Quick Step rider tested positive for a third time  in an out of competition for the drug in April, less than 12 months after he tested positive the first time in May 2008.