How many deaths will it take?
D000063:Accidents, Traffic / Q000517:prevention & control; D006259:Craniocerebral Trauma / Q000401:mortality* / Q000517:prevention & control; D006260:Head Protective Devices; D006801:Humans; D007878:Legislation as Topic; D009049:Motorcycles; D011482:Protective Devices; D013781:Texas