1. Hebrew SeniorLife, Boston, MA, USA
2. Harvard Medical School, Boston, MA, USA
3. University of Florida, Gainesville, FL, USA
4. University of Alabama at Birmingham, Birmingham, AL, USA
5. Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
6. Johns Hopkins University School of Medicine, Baltimore, MD, USA
7. University of Washington, Seattle, WA, USA
8. New England Research Institutes, Watertown, MA, USA