[1] Ottawa Hosp Rsch Inst, Neurol, Ottawa, ON, Canada
[2] Ottawa Methods Ctr, Ottawa, ON, Canada
[3] Ottawa Hosp Rsch Inst, Ottawa, ON, Canada
[4] Calgary Stroke Program, Neurol, Calgary, AB, Canada
[5] Sunnybrook Hlth Sci Ctr, Med Imaging, Toronto, ON, Canada
[6] Hosp Univ Vall dHebron, Neurol, Barcelona, Spain
[7] Dr Josep Trueta Univ Hosp, Neurol, Girona, Spain
[8] Tech Univ, Elblandklinikum Meissen Acad Teaching Hosp, Neurol, Dresden, Germany
[9] Intervent Stroke & Cerebrovasc Treatment Ctr, Neurol, Warsaw, Poland
[10] Charles LeMoyne Hosp, Med, Montreal, PQ, Canada
[11] Ottawa Hosp Rsch Inst, Diagnost Imaging, Ottawa, ON, Canada
[12] Dalhousie Univ, Neurol, Ottawa, ON, Canada
[13] All India Inst Med Sci, Neurol, New Delhi, India
[14] Apollo Gleneagles Hosp, Kolkata, India
[15] Boston Med Ctr, Neurol, Boston, MA USA
[16] Massachusetts Gen Hosp, Neurol, Boston, MA 02114 USA
[17] Massachusetts Gen Hosp, Emergency Med, Boston, MA 02114 USA