Children in car seats and in the backseat.
D001336:Automobiles; D002675:Child, Preschool; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007223:Infant; D015370:Infant Equipment / Q000706:statistics & numerical data*; D007231:Infant, Newborn; D010290:Parents / Q000523:psychology*; D011795:Surveys and Questionnaires; D014481:United States