Rapidly progressive dementia with parkinsonism in the Italian CJD Registry: underlying pathology and clinical-biomarker clues for differential diagnosis. - Costanzo M; Vaianella L; Poleggi A; Baiardi S; Bentivenga GM; Capellari S; Belvisi D; Sbriccoli M; Equestre M; Porreca F; Colaizzo E; Aiello F; et al. (Parkinsonism & related disorders, 2026)