1. Department of Emergency Medicine, Wake Forest University, Winston-Salem, NC
2. Department of Emergency Medicine, University of New Mexico, Albuquerque, NM
3. Military & Emergency Medicine Department, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD
4. Department of Family and Community Medicine, University of Nevada, Reno School of Medicine, Reno, NV
5. Department of Orthopaedic Surgery, University of Texas Health Science Center, San Antonio, TX