1. Center for Aging and Population Health, Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania
2. The Irish Longitudinal Study on Ageing, Department of Medical Gerontology, Trinity College, Dublin, Ireland
3. Unit of Academic Primary Care, Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry, UK
4. Department of Medicine, Massachusetts General Hospital, Boston
5. Sticht Center for Healthy Aging and Alzheimer’s Prevention, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
6. Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Bethesda, Maryland