1. Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Champaign, IL, USA
2. Geriatric Research, Education, and Clinical Center, Durham Veterans Affairs Healthcare System, Durham, NC, USA
3. Durham Veterans Affairs Medical Center, Durham, NC, USA
4. Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
5. Department of Medicine, Duke University, Durham, NC, USA
6. Physical Medicine and Rehabilitation Service, Durham Veterans Affairs Healthcare System, Durham, NC, USA
7. Chaplain Service, Durham Veterans Affairs Healthcare System, Durham, NC, USA