title: Epidemiological studies: risk factors session IV summary and research needs.
authors.affiliation: Department of Neurology, Henry Ford Health System, Detroit, MI, USA. gorell@neuro.hfh.edu
authors.forename: J M
authors.initials: JM
authors.lastname: Gorel
authors.forename: H
authors.initials: H
authors.lastname: Checkoway
mesh_terms: D004032:Diet; D004777:Environment; D006801:Humans; D016273:Occupational Exposure; D010300:Parkinson Disease / Q000145:classification / Q000453:epidemiology* / Q000235:genetics; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology