[1] Satakunta Hosp Dist, Neurol Unit, Pori, Finland
[2] Univ Helsinki, Div Pharmacol & Pharmacotherapy, Helsinki, Finland
[3] Univ Turku, Fac Med, Turku, Finland
[4] Satakunta Hosp Dist, Unit Clin Neurophysiol, Pori, Finland
[5] Satakunta Univ Appl Sci, Fac Hlth & Welf, Pori, Finland