Injury patterns and helmet effectiveness among hospitalized motorcyclists.
D000063:Accidents, Traffic; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D006260:Head Protective Devices; D006801:Humans; D008875:Middle Aged; D008910:Minnesota; D011482:Protective Devices; D014186:Transportation; D014947:Wounds and Injuries / Q000453:epidemiology*