1. Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA (K.S.Z., R.E.C.).
2. Massachusetts Department of Public Health, Boston, MA (V.M.N.).
3. Department of Neurology, Stroke Unit, Hospital Universitari Germans Trias I Pujol, Badalona, Spain and Stroke Programme, Catalan Health Department, Agency for Health Quality and Assessment of Catalonia, Barcelona, Spain (N.P.d.l.O).
4. Department of Emergency Medicine, Warren Alpert Medical School of Brown University, Providence, RI (T.E.M.).
5. ESO, Inc, Austin, TX (R.P.C.).
6. Division for Heart Disease and Stroke Prevention, Centers for Disease Control and Prevention, Atlanta, GA (E.C.O.).
7. Department of Research, University of North Carolina Health Sciences at Mountain Area Health Education Center, Asheville, NC (E.C.J.).
8. Department of Emergency Medicine, Washington University School of Medicine, St. Louis, MO (O.M.A.).
9. Division of EMS, Department of Emergency Medicine, University of Cincinnati College of Medicine, Cincinnati, OH (C.T.R.).