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GlaxoSmithKline has marked its role as the official laboratory services provider for London 2012 with its first UK ad to celebrate anti-doping science.

"The crowd is my only drug", by TBWA\London, launches on the day the official anti-doping laboratory for the Games becomes operational.

The work was written by Fabio Abram, art directed by Braulio Kuwabara and directed by Scott Lyon through Outsider.