Nonmotor symptoms and Parkinson disease in United States farmers and spouses.
Srishti ShresthaFreya KamelDavid M UmbachLaura E Beane FreemanStella KoutrosMichael AlavanjaDale P SandlerHonglei ChenPublished in: PloS one (2017)
The number of NMS was associated with PD in a dose-response manner and the association appeared stronger in men than in women. These findings should be further investigated in population-based prospective studies.