1. From the Department of Neurology, Washington University School of Medicine, St. Louis (R.J.B.); Roche Products, Welwyn Garden City (J.S., C.L.), and the Department of Brain Sciences, Faculty of Medicine, Imperial College London (R.J.P.), and the Dementia Research Centre, Department of Neurodegenerative Disease, and the U.K. Dementia Research Institute, Queen Square Institute of Neurology, University College London (N.C.F.), London — all in the United Kingdom; the Alzheimer’s Therapeutic Research...