1. Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, Colorado
2. Department of Emergency Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
3. Eastern Colorado Geriatric Research, Education, and Clinical Center (GRECC), Veterans Health Administration, Aurora, Colorado
4. School of Public Health, University of California San Diego, La Jolla, California
5. University of Michigan Transportation Research Institute, College of Engineering, University of Michigan, Ann Arbor, Michigan
6. Department of Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
7. Department of Epidemiology, Mailman School of Public Health, Columbia University Center for Injury Science and Prevention, Columbia University, New York, New York
8. Bassett Research Institute, Bassett Healthcare Network, Cooperstown, New York
9. Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, Colorado
10. Department of Anesthesiology, Columbia University College of Physicians and Surgeons, New York, New York