1. Department of Neurology; Philipps University; Marburg Germany
2. Second Department of Neurology, Attikon University Hospital; University of Athens; Athens Greece
3. Movement Disorders Department; Hygeia Hospital; Athens Greece
4. Institute for Medical Biometry, Epidemiology and Medical Informatics, Saarland University; Campus Homburg Homburg Germany
5. Medical Department; Noscira SA, Madrid; Spain
6. Alzheimer Project Research Unit; Fundación CIEN; Madrid Spain
7. Memory and Aging Center; Department of Neurology; University of California; San Francisco California USA
8. Department of Neurology; Technische Universität München; Munich Germany
9. German Center for Neurodegenerative Diseases (DZNE); Munich Germany