Blood samples are pictured at the Swiss Laboratory for Doping Analysis in Epalinges near Lausanne in this July 15, 2008 file photo. The battle to keep drugs out of the London Olympics has started long before the opening ceremony next July. A sophisticated laboratory provided by Britain's largest drugmaker GlaxoSmithKline, which will be packed with highly sensitive, rapid testing equipment and staffed around the clock with up to 100 scientists, stands ready and waiting. Games organisers hope that their preparedness will deter cheats. To match feature OLYMPICS-LONDON/DOPING REUTERS/Valentin Flauraud/Files (SWITZERLAND - Tags: SOCIETY HEALTH SPORT OLYMPICS)