1. Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, USA
2. Cognitive Neuroscience Division of the Department of Neurology and Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
3. Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
4. Division of Biostatistics, New York State Psychiatric Institute, New York, NY, USA
5. Department of Psychiatry, Columbia University, New York, NY, USA
6. Brookdale Department of Geriatrics and Palliative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
7. James J. Peters VA Medical Center, Bronx, NY, USA
8. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA