1. Immuno-Inflammation Centre of Excellence for Drug Discovery, GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts, SG1 2NY, U.K., Neurosciences Centre of Excellence for Drug Discovery, GlaxoSmithKline, New Frontiers Science Park, Harlow, Essex, CM19 5AW, U.K., and Molecular Discovery Research, GlaxoSmithKline, New Frontiers Science Park, Harlow, Essex, CM19 5AW, U.K.