6 Institute of Pharmacology, Catholic University Medical School, Largo F. Vito 1, 00168, Rome, Italy.
7 Department of Medical and Surgical Sciences, and Advanced Technologies, GF Ingrassia, Multiple Sclerosis Center, University of Catania, Catania, Italy.
8 Section of Biostatistics, Department of Health Sciences, University of Genova, Genoa, Italy.
9 Multiple Sclerosis Study Center, ASST Valle Olona, Gallarate, VA, Italy.