1. Department of Neurology, University of New Mexico, Albuquerque (M.T.T.).
2. Department of Public Health Sciences, Medical University of South Carolina, Charleston (Q.P., V.L.D.).
3. Department of Emergency Medicine, Temple University, Philadelphia, PA (N.G.).
4. Department of Internal Medicine and Cincinnati VAMC, University of Cincinnati College of Medicine, OH (M.F.).
5. Department of Emergency Medicine, University of Michigan, Ann Arbor (W.M.).
6. Department of Neurology, University of Kentucky, Lexington (C.L.P.).
7. Department of Neurology, Northwestern University, Chicago, IL (T.B.).
8. Department of Neurology, Augusta University, GA (A.B.).