1. German Center for Neurodegenerative Diseases, Rostock/Greifswald, Germany (Rodriguez, Grabe, Hoffmann); Department of Psychiatry and Psychotherapy (Grabe, Frenzel, Klinger-König), Institute for Diagnostic Radiology and Neuroradiology (Bülow), and Institute for Community Medicine (Völzke, Hoffmann), University Medicine Greifswald, Greifswald, Germany.