[1] Trinity Coll Dublin, Dept Pharmacol & Therapeut, Dublin 2, Ireland
[2] Trinity Coll Dublin, Inst Neurosci, Dublin 2, Ireland
[3] Trinity Coll Dublin, Dept Physiol, Dublin 2, Ireland
[4] Univ Coll Dublin, Conway Inst Biomol & Biomed Res, Dublin 4, Ireland
[5] Univ Gothenburg, Sahlgrenska Acad, Dept Psychiat & Neurochem, Inst Neurosci & Physiol, SE-40530 Gothenburg, Sweden
[6] Brigham & Womens Hosp, Ctr Neurol Dis, Boston, MA 02115 USA
[7] Harvard Univ, Sch Med, Dept Neurol, Boston, MA 02115 USA
[8] NYU, Sch Med, Dept Neurol, New York, NY 10016 USA