1 From the School of Medicine (K.L.H., N.B.), the Division of Geriatrics (K.L.H., C.S.R.), and the Philip R. Lee Institute for Health Policy Studies (K.L.H.), University of California, San Francisco, and the Global Brain Health Institute (K.L.H., C.S.R.) - both in San Francisco; and Harvard Medical School and the Mongan Institute Center for Aging and Serious Illness and the Division of Palliative Care and Geriatric Medicine, Massachusetts General Hospital - both in Boston (C.S.R.).