P4‐362: DOMAIN‐SPECIFIC COGNITIVE IMPAIRMENT AND LONGITUDINAL COGNITIVE DECLINE DIFFER IN PARKINSON'S DISEASE DEMENTIA (PDD), DEMENTIA WITH LEWY BODIES (DLB), AND ALZHEIMER'S DISEASE (AD). (1st July 2019) - Smirnov, Denis; Galasko, Douglas R.; Filoteo, J. Vincent; Edland, Steven D.; Hansen, Lawrence A.; Salmon, David P.