1. Department of Health Sciences, Faculty of Earth and Life Sciences, Amsterdam Public Health Research Institute, Vrije Universiteit, Amsterdam, Netherlands
2. Laboratory of Epidemiology and Population Sciences, Intramural Research Program, National Institute of Aging, Bethesda, MD
3. Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC
4. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA