Contribution of design and construction of football helmets to the occurrence of injuries.
D000293:Adolescent; D001134:Arm Injuries / Q000209:etiology; D001265:Athletic Injuries / Q000209:etiology* / Q000517:prevention & control; D006259:Craniocerebral Trauma / Q000209:etiology; D050723:Fractures, Bone / Q000209:etiology; D006801:Humans; D007869:Leg Injuries / Q000209:etiology; D008297:Male; D019838:Neck Injuries; D011482:Protective Devices; D013898:Thoracic Injuries / Q000209:etiology