[1] IRCCS, Neurol Inst C Mondino, Interdepartmental Res Ctr Parkinsons Dis, Pavia, Italy
[2] Univ Milan, Dept Neurol, Milan, Italy
[3] Univ Milan, IRCCS, Ist Auxolog Italiano, Neurosci Lab, Milan, Italy
[4] Univ Milan, Fdn Matarelli, Milan, Italy
[5] Univ Roma La Sapienza, Rome, Italy