1. Department of Neurology; Mayo Clinic; Rochester Minnesota
2. Institute of Anatomy and Cell Biology I
3. German Center for Vertigo and Balance Disorders
4. Institute for Neuropathology and Prion Research; Ludwig Maximilians University; Munich Germany
5. Paul Flechsig Institute for Brain Research; University of Leipzig; Leipzig Germany
6. National Institute of Neurological Disorders and Stroke; National Institutes of Health; Bethesda Maryland
7. Department of Neurology; Case Western Reserve University; Cleveland Ohio