Motorcycle helmet use and injuries.
Nunley
D L
DL
D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D002140:California / Q000453:epidemiology; D006259:Craniocerebral Trauma / Q000517:prevention & control; D006260:Head Protective Devices; D006801:Humans; D009049:Motorcycles / Q000331:legislation & jurisprudence