1 Department of Sociology, Maxwell School of Citizenship and Public Affairs, Syracuse University, Syracuse, New York; Aging Studies Institute, Syracuse University, Syracuse, New York. Electronic address: sdlandes@maxwell.syr.edu.
2 Department of Physical Medicine and Rehabilitation, SUNY Upstate Medical University, Syracuse, New York.
3 Center for Developmental Disabilities Evaluation and Research, Eunice Kennedy Shriver Center, University of Massachusetts Medical School, Worcester, Massachusetts.