P2‐141: BRAIN‐DERIVED NEUROTROPHIC FACTOR (BDNF) POLYMORPHISMS ARE ASSOCIATED WITH DIFFERENTIAL RATES OF AMYLOID ACCUMULATION AND COGNITIVE DECLINE IN COGNITIVELY NORMAL OLDER ADULTS. (1st July 2014) - Acosta, Jazmin; Geda, Yonas E.; Stokin, Gorazd B.; Fleisher, Adam S.; Reschke, Cole; Bauer, Robert J.; Thiyyagura, Pradeep; Lu, Bai; Caselli, Richard J.; Weiner, Michael; Reiman, Eric M.; Chen, Kewei