Media type: E-Article Title: Natural course of mild cognitive impairment in Parkinson disease : A 5-year population-based study : A 5-year population-based study Contributor: Pedersen, Kenn Freddy; Larsen, Jan Petter; Tysnes, Ole-Bjørn; Alves, Guido imprint: Ovid Technologies (Wolters Kluwer Health), 2017 Published in: Neurology Language: English DOI: 10.1212/wnl.0000000000003634 ISSN: 0028-3878; 1526-632X Origination: Footnote: