1. Department of Emergency Medicine University of California Los Angeles Los Angeles California USA
2. Department of Emergency Medicine Medical College of Wisconsin Milwaukee Wisconsin USA
3. Department of Emergency Medicine University of Michigan Medical School Ann Arbor Michigan USA
4. Department of Emergency Medicine University of Pittsburgh Pittsburgh Pennsylvania USA
5. Department of Emergency Medicine The Ohio State University Columbus Ohio USA
6. Department of Internal Medicine Yale University New Haven Connecticut USA
7. Departments of Emergency Medicine and Learning Health Sciences University of Michigan Medical School Ann Arbor Michigan USA