1. Department of Medicine, Section of Dermatology, University of Verona, Verona, Italy;
2. Inter-Department Research Center for Multiple Sclerosis, C. Mondino National Neurological Institute, Pavia, Italy;
3. Department of Dermatology, University of L’Aquila, L’Aquila, Italy;
4. Biogen Italia, Milan, Italy;
5. Multiple Sclerosis Center, San Salvatore Hospital, L’Aquila, Italy