Decreased cerebrospinal fluid Abeta(42) correlates with brain atrophy in cognitively normal elderly. - Fagan AM; Head D; Shah AR; Marcus D; Mintun M; Morris JC; Holtzman DM; Fagan, Anne M; Head, Denise; Shah, Aarti R; Marcus, Daniel; Mintun, Mark; et al. (Annals of Neurology, 2009)