1. Department of Neurological Sciences University of Rome “La Sapienza”, Rome, Italy
2. Toronto Western Research Institute, Toronto Western Hospital, Toronto, Canada
3. Department of Neurology, Hospital General Universitario “Gregorio Marañón”, Madrid, Spain
4. Department of Therapeutic Medicine, Faculty of Medicine, Ehime University Hospital, Ehime, Japan
5. Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA