1. Centro Studi Sclerosi Multipla, Ospedale di Gallarate, Italy
2. Department of Neurosciences — University of Florence, Italy
3. Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genova
4. Clinica Neurologica, Università di Torino, Italy
5. Centro Sclerosi Multipla, Dipartimento di Sanità Pubblica, Medicina Clinica e Molecolare, University of Cagliari, Italy
6. Multiple Sclerosis Center, Ospedale Misericordia e Dolce, Italy
7. Multiple Sclerosis Centre, I Division of Neurology, Second University of Naples, Italy
8. DANA GF Ingrassia, Neuroscience Section, Multiple Sclerosis Center, University of Catania, Italy
9. Neurological Department, Azienda Ospedaliera Università di Padova, Italy
10. Department of Neurology, Vita-Salute San Raffaele University, San Raffaele Scientific Institute, Italy
11. Multiple Sclerosis Center, Fondazione Don Gnocchi, Italy
12. Multiple Sclerosis Center, Dipartimento di Chirurgia del Sistema Nervoso e Neuroscienze, Ospedali Riuniti Bergamo, Italy