1 John P. Hussman Institute for Human Genomics (G.W.B., E.R.M., M.A.P.-V.) and Dr. John T. Macdonald Foundation Department of Human Genetics (G.W.B., E.R.M., M.A.P.-V.), Miller School of Medicine, University of Miami, FL; Cardiovascular Health Research Unit (J.C.B.), Department of Medicine, Cardiovascular Health Research Unit (B.M.P.), Departments of Medicine, Epidemiology, Health Services, Department of Biostatistics (E.W.), and Division of Medical Genetics (E.W.), Department of Medicine, University of Washington, Seattle; Department of Biostatistics (S.-H.C., A.D., L.A.F.), Boston University School of Public Health, MA; The Framingham Heart Study (A.D., S.S.), MA; Department of Neurology (A.D., L.A.F., S.S.), Boston University School of Medicine, MA; Department of Epidemiology (C.M.v.D), Erasmus MC, Rotterdam, Netherlands; Brown Foundation Institute of Molecular Medicine (M.F.) and Human Genetics Center (M.F.), University of Texas Health Science Center, Houston; The Eli and Edythe L. Broad Institute of Massachusetts Institute of Technology (S.B.G.), Cambridge; Harvard University (S.B.G.), Cambridge, MA; The McDonnell Genome Institute (D.C.K., D.E.L.) and Department of Genetics (D.E.L.), Washington University, St. Louis, MO; Department of Biostatistics and Epidemiology (A.C.N.) and Perelman School of Medicine (G.S.), University of Pennsylvania, Philadelphia; Group Health Research Institute (B.M.P.), Group Health Cooperative, Seattle, WA; Human Genome Sequencing Center (W.S., E.B.), Baylor College of Medicine, Houston, TX; Department of Epidemiology and Biostatistics (W.S.B., J.L.H.), Case Western Reserve University, Cleveland, OH; Department of Medical and Molecular Genetics (T.M.F.), Indiana University School of Medicine, Indianapolis; Department of Medicine (Biomedical Genetics) (L.A.F.), Department of Ophthalmology (L.A.F.), and Department of Epidemiology (L.A.F.), Boston University School of Medicine and Public Health, MA; Department of Neuroscience (A.G.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Genetics Center (E.B.), UT Health School of Public Health, Houston, TX; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (R.M.) and Gertrude H. Sergievsky Center (R.M.), Columbia University Medical Center, New York, NY; Department of Neurology (R.M.), Columbia University Medical Center and New York Presbyterian Hospital, NY; and Department of Epidemiology (R.M.), Mailman School of Public Health, Columbia University, New York, NY.