1. Rosalynn Carter Institute for Caregivers, Atlanta, GA 31709, USA
2. Department of Health Policy and Management, College of Public Health, University of Georgia, Athens, GA 30602, USA
3. School of Health Management, Fujian Medical University, Fuzhou 350122, China
4. Georgia Department of Public Health, Atlanta, GA 30303, USA
5. Center of Innovation in Social Science, Boston University, Boston, MA 02215, USA