[1] Massachusetts Gen Hosp, Dept Emergency Med, Boston, MA USA
[2] Massachusetts Dept Publ Hlth, Boston, MA USA
[3] Hosp Badalona Germans Trias & Pujol, Dept Neurol, Stroke Unit, Badalona, Spain
[4] Agcy Hlth Qual & Assessment Catalonia, Catalan Hlth Dept, Stroke Programme, Barcelona, Spain
[5] Brown Univ, Dept Emergency Med, Warren Alpert Med Sch, Providence, RI USA
[6] ESO Inc, Austin, TX USA
[7] Ctr Dis Control & Prevent, Div Heart Dis & Stroke Prevent, Atlanta, GA USA
[8] Univ North Carolina Hlth Sci, Dept Res, Mt Area Hlth Educ Ctr, Asheville, NC USA
[9] Washington Univ, Dept Emergency Med, Sch Med, St Louis, MO USA
[10] Univ Cincinnati, Dept Emergency Med, Div EMS, Coll Med, Cincinnati, OH USA