1. Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health; Bethesda Maryland USA
2. Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health; Bethesda Maryland USA
3. Contractor/consultant with Kelly Services; Rockville Maryland USA
4. German Center for Neurodegenerative Diseases (DZNE); Tübingen Germany
5. Department of Pathology (Neuropathology); Johns Hopkins University School of Medicine; Baltimore Maryland USA
6. Hertie Institute for Clinical Brain Research; University of Tübingen; Tübingen Germany
7. Department of Neurology; Johns Hopkins University Medical Center; Baltimore Maryland USA