Subjects: HEAD injury prevention; SNOWBOARDING; SPORTS
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Subjects: HEAD injury prevention; SPORTS injury prevention; SPORTS
Subjects: TRAFFIC safety; DISTRACTED driving laws; CONFIDENCE intervalsUNITED States
Subjects: AUTOMOBILE driving laws; INJURY risk factors; ACCIDENTSMASSACHUSETTS
Subjects: PREVENTION of obesity; SCHOOL health service laws; ELEMENTARY schoolsUNITED States