title: Smoking and PD in twins.
authors.forename: Mohamed Farouk
authors.initials: MF
authors.lastname: Allam
mesh_terms: D006801:Humans; D010300:Parkinson Disease / Q000453:epidemiology*; D018570:Risk Assessment; D012907:Smoking / Q000453:epidemiology*; D018433:Twin Studies as Topic; D014427:Twins