[1] Univ London Univ Coll, Dept Med, Ctr Clin Pharmacol & Therapeut Toxicol, London WC1E 6JJ, England
[2] Univ London Kings Coll, Pharmacol Grp, Neurodegenerat Dis Res Ctr, London WC2R 2LS, England
[3] St Bartholomews Hosp, William Harvey Res Inst, London, England
[4] Astra Hassle AB, Molndal, Sweden