title: The measurement and importance of non-motor symptoms in Parkinson disease.
authors.affiliation: Department of Clinical Neurosciences, UCL Institute of Neurology, London, UK. a.schapira@ucl.ac.uk.
authors.forename: A H V
authors.initials: AH
authors.lastname: Schapira
mesh_terms: D005260:Female; D006801:Humans; D008297:Male