The argument for helmets.
Illingworth
C
C
Children's Hospital, Sheffield.
D000063:Accidents, Traffic / Q000401:mortality; D001642:Bicycling / Q000293:injuries*; D006259:Craniocerebral Trauma / Q000401:mortality / Q000517:prevention & control*; D006260:Head Protective Devices; D006801:Humans; D006113:United Kingdom