No differences in the total burden of non-motor symptoms between Parkinson's disease and non-degenerative parkinsonism
: Jaakkola E, Joutsa J, Mäkinen E, Noponen T, Pitkonen M, Levo R, Mertsalmi T, Scheperjans F, Kaasinen V
: 2018
: Movement Disorders
: 33
: Suppl. 2
: https://onlinelibrary.wiley.com/doi/10.1002/mds.116