title: Helmeted versus unhelmeted motorcyclists: a dime's worth of difference.
authors.forename: Michael
authors.initials: M
authors.lastname: Heller
authors.forename: Jeanne
authors.initials: J
authors.lastname: Jacoby
mesh_terms: D001265:Athletic Injuries / Q000191:economics* / Q000517:prevention & control*; D017281:Cost of Illness; D006260:Head Protective Devices / Q000191:economics*; D017048:Health Care Costs; D006801:Humans; D015601:Injury Severity Score; D009049:Motorcycles; D014481:United States