1. Institut Guttmann Neurorehabilitation Hospital, University Institute attached to the Autonomous University of Barcelona, Badalona, Spain
2. Institute for Health Science Research Germans Trias i Pujol (IGTP), Badalona, Spain
3. Autonomous University of Barcelona (UAB), Cerdanyola del Vallés, Spain
4. Department of Medicine, University of British Columbia, Vancouver, Canada
5. School of Health and Exercise Sciences, University of British Columbia, Kelowna, Canada