1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
2. Department of Health and Community Systems, University of Pittsburgh School of Nursing, Pittsburgh, PA, USA
3. Center on Aging and Health, Johns Hopkins School of Medicine, Baltimore, MD, USA
4. Department of Otolaryngology – Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, MD, USA
5. Department of Psychiatry and Human Behavior, Warren Alpert Medical School, Brown University, Providence, RI, USA
6. Intramural Research Program, National Institute on Aging, Baltimore, MD, USA
7. Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, USA