1. Department of NeurologyMedical University of South Carolina Charleston South Carolina USA
2. Facultad de MedicinaClínica Alemana Universidad del Desarrollo Santiago Chile
3. IRCCS Neuromed Pozzilli Isernia Italy
4. Department of NeurologyUniversity of Alabama Huntsville Alabama USA
5. National Institute of Neurological Disorders and StrokeNational Institutes of Health Bethesda Maryland USA