1. From the Department of Neurology (A.M., M.K.), Helsinki University Central Hospital, Helsinki, Finland; the Department of Neurology (R.O.R., S.R., R.M.), Turku University Hospital, Turku, Finland; the National Institute for Health and Welfare (M.L., M.J., U.H.), Helsinki, Finland; the Department of Neurology (T.E.), Tampere University Hospital, Tampere, Finland; the Department of Neurology, Oulu University Hospital (M.H.), Oulu, Finland; the Department of Neurology (A.R.), Jyväskylä Central...