1. From the Department of Psychiatry and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany; the Department of Psychiatry and Psychotherapy and the Department of Neurodegenerative Diseases and Geriatric Psychiatry, University of Bonn, Bonn, Germany; the German Center for Neurodegenerative Diseases, Bonn; and the Max Planck Institute of Experimental Medicine, Göttingen.