1. From the Department of Neurology (T.S., D.S., L.S., V.A., I.K., O.H., M.K., P.J.L.), Helsinki University Central Hospital, Helsinki, Finland; Helsinki Medical Imaging Center (H.S., O.S.), Helsinki, Finland; Research Program Unit, Molecular Neurology (T.S., P.J.L.), Biomedicum Helsinki, University of Helsinki, Finland.