Bicycle helmet legislation: evidence for effectiveness.
D000293:Adolescent; D000328:Adult; D001642:Bicycling; D002648:Child; D002675:Child, Preschool; D006259:Craniocerebral Trauma / Q000517:prevention & control*; D019317:Evidence-Based Medicine; D006260:Head Protective Devices; D006801:Humans; D007223:Infant; D007231:Infant, Newborn