1. Clinical Laboratory of Experimental Neurorehabilitation, Fondazione Santa Lucia, IRCCS, Via Ardeatina 306, 00179 Rome, Italy
2. Department of Neurological Rehabilitation, Medical Park Berlin, Charité-Universitätsmedizin Berlin, 13507 Berlin, Germany
3. Functional Exploration and Neuromodulation of Nervous System Investigation Group (FENNSI), Hospital Nacional de Paraplejicos, Finca La Peraleda s/n, 45071 Toledo, Spain
4. Operative Unit F, Fondazione Santa Lucia, IRCCS, Via Ardeatina 306, 00179 Rome, Italy