Age-related increase of monoamine oxidase B in amyloid-negative cognitively unimpaired elderly subjects. - Sakurai K; Nihashi T; Kimura Y; Iwata K; Ikenuma H; Arahata Y; Okamura N; Yanai K; Akagi A; Ito K; Kato T; Nakamura A; et al. (Annals of nuclear medicine, 2022)