gender differences in parkinson's disease

Paper details: - what is the ratio of men to women who suffer from parkinsons - are there any evidence as to why there is a difference between genders - which sex has the earlier onset of the disease - please describe the disease (known causes, timeline for onset, genetics, effects, etc) and explain if there are similarities or differences between genders - please use statistics where possible - please reference the following text book: Watson, N.V., & Breedlove, S.M. (2015).