1. Providence VA Research Service, Providence VA Medical Center, Providence, Rhode Island, USA
2. Nursing Department, Charter Oak State College, New Britain, Connecticut, USA
3. School of Public Health, Brown University, Providence, Rhode Island, USA
4. Charles E. Schmidt College of Medicine, Florida Atlantic University (FAU), Boca Raton, Florida, USA
5. Los Angeles VA Geriatric Research, Education and Clinical Center (GRECC) and Health Services Research & Development (HSR&D) Center of Innovation, Los Angeles, California, USA
6. JH Borun Center for Gerontological Research, University of California, Los Angeles, California, USA
7. RAND Health, Santa Monica, California, USA
8. Department of Research and Evaluation, Kaiser Permanente Research, Pasadena, California, USA