1. Department of Emergency Medicine Mayo Clinic Rochester Minnesota USA
2. Department of Psychiatry Duke University Health System Durham North Carolina USA
3. Department of Emergency Medicine The George Washington University School of Medicine and Health Sciences Washington District of Columbia USA
4. Department of Surgery Division of Emergency Medicine Duke University School of Medicine Durham North Carolina USA
5. Mayo Clinic Libraries Mayo Clinic Rochester Minnesota USA
6. Department of Emergency Medicine McMaster University Hamilton Ontario Canada
7. Department of Emergency Medicine Washington University in St. Louis School of MedicineEmergency Care Research Core St. Louis Missouri USA