1. Department of Emergency Medicine Washington University in St. Louis School of Medicine Emergency Care Research Core St. Louis Missouri USA
2. Department of Emergency Medicine Columbia University College of Physicians and Surgeons New York New York USA
3. Becker Medical Library Washington University in St. Louis School of Medicine St. Louis Missouri USA
4. Department of Emergency Medicine Mayo Clinic Rochester Minnesota USA
5. Emergency Medicine/Health Research Methods Evidence & Impact McMaster University Hamilton Ontario Canada
6. Division of Emergency Medicine Duke University School of Medicine Durham North Carolina USA