Kraemer, John D <br/><br/>
Bicycle helmet laws and persistent racial and ethnic helmet use disparities among urban high school students: a repeated cross-sectional analysis.  [electronic resource] 

 -  Injury epidemiology  Dec 2016 
 - 21 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>2197-1714 
<br/><br/><label>Standard No.: </label>10.1186/s40621-016-0086-3  doi