1. From the Department of Neurology (R.Y., A.E.G., J.J.L., E.P., M.P., E.G.T., E.C., K.A.J., M.J.B., A.T., J.G., B.C.D., S.N.G.), Massachusetts General Hospital, Boston; Mass General Institute of Neurodegenerative Disease (R.Y., A.E.G., E.P., S.N.G.), Charlestown; Lewy Body Dementia Unit (R.Y., A.E.G., E.P., S.N.G.) and Frontotemporal Disorders Unit (M.J.B., A.T., B.C.D.), Massachusetts General Hospital, Boston.