Kristin Poland, a deputy director at the NTSB, went over the results of a concussion study of students in a school bus accident that showed that lap-shoulder belts can protect students from suffering concussions in crashes.
Kristin Poland, a deputy director at the NTSB, went over the results of a concussion study of students in a school bus accident that showed that lap-shoulder belts can protect students from suffering concussions in crashes.
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