Helmets not helpful--an example of poor public policy.
Curnow
W J
WJ
D001315:Australia / Q000453:epidemiology; D001642:Bicycling / Q000293:injuries / Q000331:legislation & jurisprudence* / Q000706:statistics & numerical data; D006260:Head Protective Devices; D006291:Health Policy; D006801:Humans; D018570:Risk Assessment; D014947:Wounds and Injuries / Q000453:epidemiology / Q000517:prevention & control*