[1] IRCCS Fdn, C Besta Neurol Inst, Neuroimmunol & Neuromuscular Disorder Unit, Milan, Italy
[2] Ist Sci San Raffaele, Inst Expt Neurol INSpe, I-20132 Milan, Italy
[3] Stanford Univ, Dept Pediat, Stanford, CA 94305 USA
[4] Stanford Univ, Dept Neurol, Stanford, CA 94305 USA
[5] Stanford Univ, Dept Neurol Sci, Stanford, CA 94305 USA