1 Department of Translational Medicine, Section of Neurology, University of Eastern Piedmont Amedeo Avogadro, 28100 Novara, Italy ; Interdisciplinary Research Center of Autoimmune Diseases (IRCAD), University of Eastern Piedmont Amedeo Avogadro, 28100 Novara, Italy.
2 Interdisciplinary Research Center of Autoimmune Diseases (IRCAD), University of Eastern Piedmont Amedeo Avogadro, 28100 Novara, Italy.
3 Department of Neurorehabilitation and INSPE, San Raffaele Scientific Institute, 20132 Milan, Italy.
4 Department of Neurology, Oakland University William Beaumont School of Medicine, Royal Oak, MI 48073, USA.