1. Department of Public Health, Clinical and Molecular Medicine, University of Cagliari, Cagliari, Italy
2. Physical Medicine and Rehabilitation Unit, Scientific Institute of Lissone, Salvatore Maugeri Foundation IRCCS, Lissone, Italy
3. Neuroengineering and Medical Robotics Laboratory, Politecnico di Milano, Milan, Italy
4. Canadian Memorial Chiropractic College, Toronto, Ontario, Canada