title: Bicycle helmets: it's time to use them.
authors.forename: F P
authors.initials: FP
authors.lastname: Rivara
authors.forename: D C
authors.initials: DC
authors.lastname: Thompson
authors.forename: R S
authors.initials: RS
authors.lastname: Thompson
mesh_terms: D000063:Accidents, Traffic; D001642:Bicycling; D006259:Craniocerebral Trauma / Q000517:prevention & control*; D006260:Head Protective Devices / Q000706:statistics & numerical data; D006801:Humans; D018570:Risk Assessment