aDepartment of Neuroscience, University of Turin Medical School, and National Institute of Neuroscience, Turin, Italy
bDepartment of Vision and Neurological Sciences, University of Verona, Verona, Italy
cMotor Rehabilitation, IRCSS San Raffaele, Rome, Italy
dDivision of Neurology, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
*Corresponding author. Address: Dipartimento di Neuroscienze, Università di Torino, Corso Raffello 30, 10125 Turin, Italy. Tel.: +39 011 6707701; fax: +39 011 6708174.
E-mail: [email protected]
1These authors have equally contributed.
Submitted December 7, 2007; revised April 21, 2008; accepted April 24, 2008.