[1] Washington Univ, Dept Neurol, 4488 Forest Pk,Campus Box 8111, St Louis, MO 63108 USA
[2] Washington Univ, Ctr Clin Studies, St Louis, MO 63110 USA
[3] Univ Calgary, Dept Biomed Engn, Calgary, AB, Canada
[4] Univ Calgary, Dept Geomat Engn, Calgary, AB, Canada
[5] Univ Calgary, Hotchkiss Brain Inst, Calgary, AB, Canada
[6] Washington Univ, Inst Publ Hlth, St Louis, MO 63110 USA
[7] Univ Johannesburg, Fac Humanities, Dept Psychol, Johannesburg, South Africa
[8] George Washington Univ, Sch Med & Hlth Sci, Dept Clin Res & Leadership, Washington, DC 20052 USA