Crash helmets reduce head injuries.
D000007:Abdominal Injuries / Q000453:epidemiology; D000063:Accidents, Traffic; D001315:Australia; D001930:Brain Injuries / Q000453:epidemiology; D006259:Craniocerebral Trauma / Q000453:epidemiology / Q000401:mortality / Q000517:prevention & control*; D006801:Humans; D007869:Leg Injuries / Q000453:epidemiology; D007878:Legislation as Topic; D010388:Pelvis / Q000293:injuries; D011482:Protective Devices; D012887:Skull Fractures / Q000453:epidemiology; D013898:Thoracic Injuries / Q000453:epidemiology