1. From the Rush Institute for Healthy Aging, Department of Internal Medicine (K.B.R., D.A.E.), Rush Alzheimer’s Disease Center (N.T.A., R.S.W.), Department of Neurological Sciences (N.T.A., R.S.W.), and Department of Behavioral Sciences (R.S.W.), Rush University Medical Center, Chicago, IL; and Department of Medicine, University of Minnesota, Minneapolis (S.A.E.-R.).