[1] GlaxoSmithKline, Neurol & GI Ctr Excellence Drug Discovery, Harlow CM19 5AW, Essex, England
[2] GlaxoSmithKline R&D, Mol Discovery Res, Harlow CM19 5AW, Essex, England
[3] GlaxoSmithKline, Med Res Ctr, Immunoinflammat Ctr Excellence Drug Discovery, Stevenage SG1 2NY, Herts, England
[4] NiKem Res Srl, I-20021 Baranzate Di Bollate, MI, Italy