The Relationship between Behavioural Changes, Cognitive Symptoms, and Functional Disability in Primary Progressive Aphasia: A Longitudinal StudyO'Connor, Claire M.; Clemson, Lindy; Flanagan, Emma; Kaizik, Cassandra; Brodaty, Henry; Hodges, John R.; Piguet, Olivier; Mioshi, Eneida · Dementia and Geriatric Cognitive Disorders · 2016