1. Multiple Sclerosis Center, Neurocenter of Southern Switzerland, EOC, Lugano, Switzerland
2. Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
3. Scientific Research Area, Italian Multiple Sclerosis Foundation (FISM), Genoa, Italy
4. Department of Medical, Oral and Biotechnological Sciences, Laboratory of Biostatistics, University “G. d’Annunzio” Chieti-Pescara, Chieti, Italy
5. IRCCS Mondino Foundation, Pavia, Italy