1. Department of Emergency Medicine; The Ohio State University; Wexner Medical Center; Columbus Ohio
2. Center for Biostatistics; The Ohio State University; Columbus Ohio
3. College of Medicine; The Ohio State University; Wexner Medical Center; Columbus Ohio
4. Department of Emergency Medicine; Stanford University Medical Center; Stanford California
5. Department of Surgery; The Ohio State University; Wexner Medical Center; Columbus Ohio
6. Berbee Walsh Department of Emergency Medicine; University of Wisconsin-Madison; Madison Wisconsin