1. From the Clinical Neurosciences, Department of Neurology, University of Helsinki and Helsinki University Central Hospital, Finland (K.A., E.H., S.M., M.K., T.T., J.P.); Department of Oncology, Helsinki University Central Hospital, Helsinki, Finland (H.J.); and Institute of Neurosciences and Physiology, Sahlgrenska Academy, University of Gothenburg and Department of Neurology, Sahlgrenska University Hospital, Gothenburg, Sweden (T.T.).