1. Geriatric Research, Education, and Clinical Center, Salt Lake City VAMC, Salt Lake City, Utah
2. Department of Internal Medicine, University of Utah, Salt Lake City, Utah
3. Center on Aging, University of Utah, Salt Lake City, Utah
4. Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
5. Department of Kinesiology, University of Connecticut, Storrs, Connecticut
6. Department of Orthopedic Surgery & Center of Aging, University of Connecticut School of Medicine, Farmington, Connecticut