1. Dr. Senckenberg Chronomedical Institute; Goethe-University; Frankfurt/Main Germany
2. Department of Neurology; University Medical Center Groningen; Groningen The Netherlands
3. Morphological Brain Research Unit; Psychiatric Clinic; Julius Maximilians University Würzburg; Würzburg Germany
4. Department of Neurology; Goethe-University; Frankfurt/Main Germany
5. Department of Neurology; University of Michigan; Ann Arbor MI
6. The New York Brain Bank/Taub Institute; The Presbyterian Hospital and Columbia University; New York NY
7. Chorea Center; Department of Neurology; University of Muenster; Münster Germany
8. Department of Pathology and Medical Biology; University of Groningen; Groningen The Netherlands