1. Neurology Service (KWT, MDK, GF, HN, BC, DCA, AC, BVR, AEB); Center for Translational Cognitive Neuroscience (KWT, MDK, GF, HN, BC, DCA, AC, AEB), VA Boston Healthcare System; Neurology Service (KWT, AEB), Alzheimer's Disease Research Center, Boston University School of Medicine; Geriatrics Service (AN); Radiology Service (AM); Nursing Service (VC, NP); and Clinical Pharmacy Service (CW, LMV, JR, LT), VA Boston Healthcare System, Boston, MA.