1. Center for Aging in Diverse Communities, Institute for Health & Aging, University of California San Francisco (UCSF), San Francisco, California, USA.
2. Department of Family Health Care Nursing, UCSF School of Nursing, San Francisco, California, USA.
3. Division of Intramural Research, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, Maryland, USA.