1. From the Center for Drug Safety and Effectiveness and the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore (G.C.A.); the Department of Neurology, Mayo Clinic, Rochester, MN (D.S.K.); the Department of Biostatistics, University of Washington, Seattle (S.S.E.); the Department of Neurology, University of California, San Francisco (B.O.); the Bin Zhang Department of Statistics and the Sanders Brown Center on Aging, University of Kentucky, Lexington (R.J.K.); the...