1 From the Department of Emergency Medicine (R.R.), University of Michigan Ann Arbor; Department of Emergency Medicine (T.E.M.), Alpert Medical School of Brown University, Providence, RI; and Department of Epidemiology (T.E.M.), Brown University School of Public Health, Providence, RI.
2 From the Department of Emergency Medicine (R.R.), University of Michigan Ann Arbor; Department of Emergency Medicine (T.E.M.), Alpert Medical School of Brown University, Providence, RI; and Department of Epidemiology (T.E.M.), Brown University School of Public Health, Providence, RI. tracy_madsen@brown.edu.