Why do child cyclists in the United States remain unhelmeted?
Bergman
A B
AB
Department of Pediatrics, University of Washington, Harborview Injury Prevention and Research Center, Seattle, WA 98104, USA.
Rivara
F P
FP
D000293:Adolescent; D001642:Bicycling / Q000293:injuries*; D002648:Child; D002675:Child, Preschool; D006259:Craniocerebral Trauma / Q000517:prevention & control*; D006260:Head Protective Devices / Q000706:statistics & numerical data*; D006293:Health Promotion / Q000458:organization & administration*; D006801:Humans; D014481:United States; D014861:Washington