1. Brain Connectivity Center; C. Mondino National Neurological Institute; Via Mondino 2 Pavia I-27100 Italy
2. NeuroEngineering and Medical Robotics Laboratory; Department of Electronics; Information and Bioengineering; Politecnico di Milano; Milano Italy
3. Non-invasive Brain Stimulation Unit; Santa Lucia Foundation IRCCS; Via Ardeatina 306 00179 Rome Italy
4. Department of Brain and Behavioral Sciences; University of Pavia; Via Forlanini 6 Pavia I-27100 Italy