1. Geriatric Research Education and Clinical Center, James J. Peters VA, Bronx, New York, USA
2. Center for Health Information and Communication, Health Services Research & Development Service, Richard L. Roudebush VA, Indianapolis, Indiana, USA
3. Department of Geriatrics and Palliative Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
4. Department of Epidemiology, Indiana University, Fairbanks School of Public Health, Indianapolis, Indiana, USA
5. Center for Biomedical Informatics, Regenstrief Institute, Center for Biomedical Informatics, Indianapolis, Indiana, USA
6. Department of Medicine, Indiana University, School of Medicine, Indianapolis, Indiana, USA