[1] ASST G Pini CTO, Parkinson Inst, Ex ICP, Milan, Italy
[2] Univ Bologna, Dept Stat Sci P Fortunati, Bologna, Italy
[3] Fdn IRCCS Policlin San Matteo, Pavia, Italy
[4] Rehabil Moriggia Pelascini Hosp Gravedona & Uniti, Dept Brain Injury & Parkinson Dis, Como, Italy
[5] Sol & Solos Hosp, Dept Funct Rehabil, Torre Pedrera, Rimini, Italy