1. Neuroimaging Laboratory, Santa Lucia Foundation, IRCCS, Rome, Italy
2. Department of Clinical and Behavioural Neurology, Santa Lucia Foundation, IRCCS, Rome, Italy
3. Department of Neuroscience, University of Rome ‘Tor Vergata’, Rome, Italy
4. Institute of Neurology, Universitá Cattolica, Rome, Italy
5. Clinical Imaging Sciences Centre, Brighton & Sussex Medical School, Falmer, UK