title: Rollback of Michigan's Motorcycle Helmet Law Results in More Head Injuries.
abstract: Helmet nonuse and intoxication increase trauma and fatalities.
authors.affiliation: Lucy Wang Halpern.
authors.forename: Lucy Wang
authors.initials: LW
authors.lastname: Halpern
mesh_terms: D006259:Craniocerebral Trauma / Q000453:epidemiology*; D006260:Head Protective Devices / Q000706:statistics & numerical data; D006801:Humans; D008824:Michigan / Q000453:epidemiology; D009049:Motorcycles