Department of Neurology, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. Department of Neurology, Ulm University, Ulm, Germany. Department of Neurology, University Hospital Essen, Essen, Germany. Department of Neurology, Heidelberg University Hospital, Heidelberg, Germany. Department of Neurology, University of Rostock, Rostock, Germany. Department of Neurology, Hannover Medical School, Hannover, Germany. Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany. Department of Neurology, University Medicine Göttingen, Göttingen, Germany. Department of Neurology, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany. German Center for Neurodegenerative Diseases (DZNE) Ulm, Ulm, Germany. German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany. Department of Neurology, Translational Neurodegeneration Section "Albrecht-Kossel", University Medical Center Rostock, University of Rostock, Rostock, Germany. German Center for Neurodegenerative Diseases (DZNE) Rostock/Greifswald, Rostock, Germany.