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Subjects
- Accidents, Traffic -- prevention & control1
- Accidents, Traffic -- statistics & numerical data1
- Adolescent4
- Adult4
- African Americans1
- Athletic Injuries1
- Brain Concussion1
- Brain Injuries, Traumatic1
- Cell Phone1
- Cell Phone Use -- adverse effects1
- Cell Phone Use -- legislation & jurisprudence1
- Cell Phone Use -- statistics & numerical data1
- Child1
- Choice Behavior1
- Computer Security1
- Contraception -- economics2
- Contraception -- statistics & numerical data3
- Contraception Behavior -- ethnology1
- Contraception Behavior -- statistics & numerical data2
- Contraception, Barrier -- economics1