P4‐296: Cerebral Amyloid‐β and Gait Speed in Older Adults Without Dementia: Influence of Cognition and APOE‐E4 Genotype. (1st July 2016) - Nadkarni, Neelesh K.; Perera, Subashan; Snitz, Beth E.; Price, Julie; Mathis, Chester; Klunk, William E.; Williamson, Jeff; DeKosky, Steven; Lopez, Oscar L.