1. Center for Policy and Research in Emergency Medicine, Oregon Health and Science University, Portland (M.H., M.D.).
2. Clinical Trial Center (R.H.S., H.H.)
3. Department of Emergency Medicine (B.G.)
4. Department of Emergency Medicine, St Paul’s Hospital (F.S.), University of British Columbia, Vancouver, Canada.
5. Sunnybrook Center for Prehospital Medicine, Department of Family and Community Medicine, Division of Emergency Medicine, Li Ka Shing Knowledge Institute of St. Michaels Hospital (S.C.)
6. Office of the Medical Director, MedStar Mobile Healthcare, Fort Worth, TX (V.V.).
7. Department of Pediatrics, University of Ottawa, Ontario, Canada (F.A.).
8. Department of Internal Medicine (T.R.), University of Washington, Seattle.
9. Department of Emergency Medicine, University of Texas Southwestern Medical Center, Dallas (A.H.I.).
10. Departments of Critical Care and Pediatrics (J.H.), University of Toronto, Ontario, Canada.
11. Department of Emergency Medicine, The Ottawa Hospital, Ontario, Canada (M.A.).
12. National Center for Complimentary and Integrative Health, National Institutes of Health, Bethesda, MD (D.E.).