1. Department of Medicine, Emory University School of Medicine, 100 Woodruff Circle, Atlanta, GA 30322, USA
2. Center for Visual and Neurocognitive Rehabilitation, Atlanta Veterans Affairs Healthcare System, 1670 Clairmont Rd., Decatur, GA 30033, USA
3. Birmingham/Atlanta VA Geriatric Research, Education, and Clinical Center (GRECC), Decatur VA Research Building, 3101 Clairmont Rd., Mail Stop Code 11-B, Brookhaven, GA 30329, USA
4. Nell Hodgson Woodruff School of Nursing, Emory University, 1520 Clifton Rd., Atlanta, GA 30322, USA
5. Department of Rehabilitation Medicine, Emory University School of Medicine, 1441 Clifton Rd., Atlanta, GA 30322, USA