Name	Info	Provider	Link
Parkinson's Disease	free resource	MedlinePlus Health Information	https://medlineplus.gov/parkinsonsdisease.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25925389/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/25925389
Full text from University of California eScholarship	free resource	eScholarship, California Digital Library, University of California	https://escholarship.org/uc/item/1gr7v854
	free resource	scite Smart Citations	https://scite.ai/reports/25925389
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/aje/article-lookup/doi/10.1093/aje/kwu332