1. Department of Geriatrics and Orthopaedics Università Cattolica del Sacro Cuore Rome Italy
2. UOC Neuroriabilitazione ad Alta Intensità, Fondazione Policlinico Universitario A. Gemelli IRCCS Rome Italy
3. Department of Neurosciences Università Cattolica del Sacro Cuore Rome Italy
4. Department of Neurology/Neuromuscular Division Duke University Durham North Carolina USA