1. School of Rehabilitation Science; Institute for Applied Health Sciences; McMaster University, Room 403; 1400 Main Street West Hamilton Ontario L8S 1C7 Canada
2. Department of Medicine; McMaster University; Hamilton Ontario Canada
3. Qmetrics Technologies; Rochester New York
4. Escuela de Medicina; Tecnológico de Monterrey; Monterrey Nuevo León México
5. Department of Kinesiology; University of Waterloo; Waterloo Ontario Canada