1 Department of Emergency Medicine, University of Colorado, School of Medicine, Aurora, Colorado, USA.
2 Division of Geriatrics and Multidisciplinary Center on Aging, University of Colorado, School of Medicine, Aurora, Colorado, USA.
3 Veterans Affairs Eastern Colorado Geriatric Research Education and Clinical Center, Rocky Mountain Regional VA Medical Center, Aurora, Colorado, USA.
4 Division of Cardiology, University of Colorado, School of Medicine, Aurora, Colorado, USA.
5 Adult and Child Consortium for Outcomes Research and Delivery Science, University of Colorado, School of Medicine, Aurora, Colorado, USA.
6 Division of Geriatric Medicine, University of Colorado, School of Medicine, Aurora, Colorado, USA.
7 Harvard Injury Control Research Center, Harvard School of Public Health, Boston, Massachusetts, USA.