title: Nonmotor symptoms of Parkinson's disease.
authors.affiliation: Movement Disorders Center, First Department of Neurology, Medical Faculty, St. Anne's University Hospital and Applied Neuroscience Research Group, Central European Institute of Technology CEITEC, Masaryk University, 625 00 Brno, Czech Republic.
authors.forename: Irena
authors.initials: I
authors.lastname: Rektorova
authors.forename: Dag
authors.initials: D
authors.lastname: Aarsland
authors.forename: K Ray
authors.initials: KR
authors.lastname: Chaudhuri
authors.forename: Antonio P
authors.initials: AP
authors.lastname: Strafella