[1] Univ Texas Southwestern, Dept Neurol & Neurotherapeut, 5323 Harry Hines Blvd, Dallas, TX 75390 USA
[2] Amer Heart Assoc, Hosp Accreditat Serv, Dallas, TX USA
[3] Univ Texas Southwestern, Emergency Dept, Dept Nursing, Dallas, TX USA
[4] Duke Univ, Dept Neurol, Durham, NC USA