1. Center for Gerontology and Health Care Research, Department of Community Health, The Warren Alpert Medical School at Brown University, Providence, Rhode Island.
2. Hebrew Senior Life, Institute for Aging Research and Beth Israel Deaconess Medical Center, Boston, Massachusetts.
3. Center for Evaluative Clinical Science at Dartmouth Medical School, Hanover, New Hampshire.
4. Division of Geriatric Medicine, Rhode Island Hospital, Providence, Rhode Island.