1. VA Eastern Colorado Health Care System VA Eastern Colorado Geriatric Research, Education, and Clinical Center (GRECC), , Aurora, Colorado , USA
2. University of Colorado Physical Therapy Program, Department of Physical Medicine and Rehabilitation, , Aurora, Colorado , USA
3. University of Colorado Adult and Child Consortium for Health Outcomes Research and Delivery Science, , Aurora, Colorado , USA
4. University of Colorado Division of Health Care Policy and Research, , Aurora, Colorado , USA
5. University of Texas Medical Branch - Galveston Nutrition, Metabolic & Rehabilitation Science Department, , Galveston, Texas , USA