[url=http://www.cyclingweekly.co.uk/news/latest/501437/contador-tests-positive-for-clenbuterol-says-governing-body.html]The Union Cycliste Internationale (UCI), cycling's governing body, has provisionally suspended Tour de France winner Alberto Contador today after an anti-doping test taken at this year's race revealed traces of the banned drug clenbuterol.[/url]
"The concentration found by the laboratory was estimated at 50 picograms (or 0.000 000 000 05 grams per ml)," said the UCI in today's press release, "which is 400 times less than what the anti-doping laboratories accredited by WADA must be able to detect."