1 Department of Neurology, St. Josef-Hospital; Neurodegeneration Research, Protein Research Unit Ruhr (PURE), Ruhr University Bochum, Bochum, Germany.
2 Department of Neurology, St. Josef-Hospital, Ruhr-University Bochum, Bochum; Department of Neurology, St. Josef-Hospital, Katholische Kliniken Ruhrhalbinsel, Contilia Gruppe, Essen, Germany.