1. Department of Emergency Medicine University of Cincinnati College of Medicine Cincinnati Ohio USA
2. Division of Emergency Medicine, Department of Internal Medicine Morsani College of Medicine, University of South Florida, Tampa General Hospital Tampa Florida USA
3. Department of Emergency Medicine The Johns Hopkins University Baltimore Maryland USA
4. Department of Emergency Medicine University of California Davis Sacramento California USA
5. Department of Emergency Medicine Boston University School of Medicine/Boston Medical Center Boston Massachusetts USA
6. Department of Emergency Medicine Albany Medical College Albany New York USA
7. Department of Emergency Medicine, Denver Health Medical Center University of Colorado School of Medicine Denver Colorado USA
8. Department of Epidemiology Colorado School of Public Health Aurora Colorado USA
9. Center for Addiction Research University of Cincinnati College of Medicine Cincinnati Ohio USA