[1] Univ Western Ontario, Fac Hlth Sci, St Josephs Hlth Annex Sch Kinesiol, Canadian Ctr Act & Aging, London, ON N6G 2M3, Canada
[2] Univ Western Ontario, Dept Clin Neurol Sci, London, ON, Canada
[3] Univ Western Ontario, Dept Rehabil Med, London, ON, Canada
[4] Univ Waterloo, Dept Syst Design Engn, Waterloo, ON N2L 3G1, Canada
[5] Univ Western Ontario, Fac Med & Dent, Dept Anat & Cell Biol, London, ON, Canada