Cross-sectional and longitudinal associations of self-perceptions of aging with physical activity in multimorbidity: The role of depressive symptoms. - Mezza F; Tang E; Lemmo D; Freda MF; Mataró M; Stephan BCM; Corbett A; Ballard C; Creese B; Aarsland D; Hampshire A; Palmer A; et al. (Archives of gerontology and geriatrics, 2026)