1. Center for Policy and Research in Emergency Medicine and the Department of Emergency Medicine; Oregon Health & Science University; Portland; OR
2. Department of Emergency Medicine; Akron General Medical Center; Akron; OH
3. Departments of Emergency Medicine & Internal Medicine; Jesse Brown Veterans Administration Medical Center; Chicago; IL
4. Department of Emergency Medicine; University of California at Davis; Sacramento; CA
5. Department of Emergency Medicine; Boston University School of Medicine; Boston; MA
6. Division of Emergency Medicine; University of Washington; Seattle; WA
7. Department of Emergency Medicine; Denver Health Medical Center; Denver; CO
8. Department of Emergency Medicine; Beth Israel Medical Center; Albert Einstein College of Medicine; New York City; NY
9. Department of Emergency Medicine; University of Michigan; Ann Arbor; MI