1. Health Studies Program, College of Health Sciences, University of Rhode Island, Kingston, Rhode Island, USA
2. Institute for Health & Disability Policy Studies, University of Kansas, Lawrence, Kansas, USA
3. Center for Gerontology and Health Care Research, Department of Health Services Policy & Practice, Brown University School of Public Health, Providence, Rhode Island, USA
4. Department of Health Policy and Management, University of Kansas Medical Center, Kansas City, KS, USA