1. Research and Training Institute, Hebrew Rehabilitation Center for Aged, Boston, MA,
2. Research and Training Institute, Hebrew Rehabilitation Center for Aged, Boston, MA
3. University of Michigan Institute of Gerontology and Ann Arbor VA Medical Center, Ann Arbor, MI
4. Department of Health Studies and Gerontology, University of Water-loo, Toronto, Canada, and Homewood Research Institute, Guelph, Canada