1. Laboratory of Neurogenetics National Institute on Aging National Institutes of Health Bethesda Maryland USA
2. Virginia Commonwealth University School of Nursing Richmond Virginia USA
3. Medical University of South Carolina School of Nursing Charleston North Carolina USA
4. Data Tecnica International Glen Echo Maryland USA
5. Department of Pharmacotherapy & Outcomes Science Geriatric Pharmacotherapy Program, School of Pharmacy Virginia Commonwealth University Richmond VA USA
6. Laboratory of Clinical Epidemiology InCHIANTI Study Group Local Health Unit Tuscany Center Florence Italy
7. Longitudinal Studies Section Translational Gerontology Branch National Institute on Aging Baltimore Maryland USA
8. Department of Neurology Virginia Commonwealth School of Medicine Richmond Virginia USA