1. Department of Sociology, Aging Studies Institute, Center for Aging and Policy Studies, Lerner Center for Public Health Promotion, Maxwell School of Citizenship & Public Affairs, Syracuse, New York, USA
2. Department of Sociology, University of Alabama at Birmingham, Birmingham, Alabama, USA
3. Center of Family and Demographic Research, Bowling Green State University, Bowling Green, Ohio, USA
4. Department of Human Development & Family Science, Aging Studies Institute, Center for Aging and Policy Studies, Lerner Center for Public Health Promotion, Syracuse University, Syracuse, New York, USA
5. Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas, USA
6. Division of Geriatrics, Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, USA