1. NIA Layton Aging and Alzheimer's Disease Research Center, Oregon Health & Science University, Portland, OR, USA
2. College of Social Work, University of South Carolina, Columbia, SC, USA
3. Department of Health Promotion, Education, and Behavior & Office for the Study of Aging, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
4. Department of Kinesiology and Nutrition, College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL, USA
5. School of Nursing and an Investigator with the Health Promotion Research Center, School of Public Health, University of Washington, Seattle, WA, USA