1. Department of Emergency Medicine Yale School of Medicine New Haven Connecticut USA
2. Center for Outcomes Research and Evaluation Yale School of Medicine New Haven Connecticut USA
3. Department of Emergency Medicine Stanford University School of Medicine Stanford California USA
4. Geisel School of Medicine at Dartmouth Hanover New Hampshire USA
5. Ronald O. Perelman Department of Emergency Medicine and Department of Population Health New York University Grossman School of Medicine New York New York USA
6. Department of Biostatistics Yale School of Public Health New Haven Connecticut USA
7. Geriatrics Research, Education and Clinical Center James J. Peters VA Medical Center Bronx New York USA
8. Department of Emergency Medicine Vanderbilt University School of Medicine Nashville Tennessee USA