1. Department of Gerontology and Gerontology Institute, John W. McCormack Graduate School of Policy Studies, University of Massachusetts Boston, Boston, Massachusetts, USA
2. Center for Gerontology and Healthcare Research, School of Public Health, Brown University, Providence, Rhode Island, USA
3. Canandaigua VA Medical Center, Canandaigua, New York, USA
4. Department of Public Health Sciences, School of Medicine and Dentistry, University of Rochester, Rochester, New York, USA
5. Providence VA Medical Center, Providence, Rhode Island, USA
6. The Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA