1. Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
2. Glenrose Rehabilitation Hospital, Edmonton, Alberta, Canada
3. Facultad de Ciencias de la Salud, Universidad del Rosario, Bogota, Colombia
4. Escuela Colombiana de Ingeniería Julio Garavito, Bogota, Colombia
5. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada