Cognitive Status, Gray Matter Atrophy, and Lower Orthostatic Blood Pressure in Older Adults. - O'Hare, Celia; Kenny, Rose-Anne; Aizenstein, Howard; Boudreau, Robert; Newman, Anne; Launer, Lenore; Satterfield, Suzanne; Yaffe, Kristine; Rosano, Caterina; Health ABC Study (Journal of Alzheimer's Disease, 2017)