Columbia University - Taub Institute for Research on Alzheimer's and the Aging Brain, Boston University - Boston Medical Center, Boston University - Boston Medical Center, Oregon State University, Tufts University - Tufts Medical Center, University of Southern Denmark - Unit for Epidemiology, Biostatistics and Biodemography, University of Minnesota - Minneapolis - Department of Laboratory Medicine and Pathology, Columbia University - Departments of Epidemiology and Neurology and Columbia University - Departments of Epidemiology and Neurology