Diffusion MRI relates to plasma Aβ42/40 in PET negative participants without dementia. - DeSimone JC; Wang WE; Loewenstein DA; Duara R; Smith GE; McFarland KN; Armstrong MJ; Weber DM; Barker W; Coombes SA; Vaillancourt DE (Alzheimer's & dementia : the journal of the Alzheimer's Association, 2024)