[1] Univ Calgary, Cumming Sch Med, Dept Clin Neurosci, Calgary, AB, Canada
[2] Heart & Stroke Fdn Canada, Toronto, ON, Canada
[3] Univ Toronto, Dept Med Neurol, Toronto, ON, Canada
[4] Sunnybrook Hlth Sci Ctr, Toronto, ON, Canada
[5] Univ Calgary, Hotchkiss Brain Inst, Cumming Sch Med, Calgary, AB, Canada
[6] Univ Calgary, Cumming Sch Med, Dept Community Hlth Sci, Calgary, AB, Canada
[7] Univ Calgary, Cumming Sch Med, Dept Med, Calgary, AB, Canada
[8] Univ Calgary, Cumming Sch Med, Dept Radiol, Calgary, AB, Canada
[9] Foothills Med Ctr, Calgary, AB, Canada
[10] Univ Calgary, Cumming Sch Med, Dept Emergency Med, Calgary, AB, Canada
[11] Univ Calgary, Ctr Hlth Informat, Cumming Sch Med, Calgary, AB, Canada
[12] Univ Calgary, OBrien Inst Publ Hlth, Cumming Sch Med, Calgary, AB, Canada