1. From Eli Lilly (M.A.M., A.C.L., C.D.E., A.M.W., P.A.A., S.W.A., S.S., J.S., J.R.S., M.B., D.M.S.) and the Departments of Neurology, of Radiology and Imaging Sciences, and of Medical and Molecular Genetics and the Indiana Alzheimer Disease Center, Indiana University School of Medicine (L.G.A.) — both in Indianapolis; and the Departments of Psychiatry and Human Behavior and of Neurology, Butler Hospital, Warren Alpert Medical School of Brown University, Providence, RI (S.P.S.).