1. Department of Neurology and Institute of Experimental Neurology, Università Vita-Salute San Raffaele, Ospedale San Raffaele, Milan 20132, Italy
2. Rutgers, The State University of New Jersey, New Jersey Medical School, Newark, NJ, USA
3. Depatment of Neurology, University of Miami School of Medicine, Miami, FL, USA
4. Department of Neurology, University of Copenhagen, Copenhagen, Denmark
5. University of Lille, Lille, France
6. EMD Serono, Inc., Billerica, MA, USA
7. Queen Mary University of London, Barts and The London School of Medicine and Dentistry, London, UK