[P4–276]: APOE GENOTYPE INFLUENCES HOW CEREBRAL BLOOD FLOW AND VASOREACTIVITY PREDICT NEUROPSYCHOLOGICAL DECLINE OVER AN 18‐MONTH FOLLOW‐UP: THE VANDERBILT MEMORY AND AGING STUDY. (1st July 2017) - Osborn, Katie E.; Neal, Jacquelyn E.; Liu, Dandan; Pechman, Kimberly R.; Badami, Faizan; Watchmaker, Jennifer M.; Gordon, Elizabeth A.; Cambronero, Francis E.; Gifford, Katherine A.; Hohman, Timothy J.; Donahue, Manus J.; Jefferson, Angela L.