1. Centers for Disease Control and Prevention Youth Risk Behavior Surveillance --- United States, 2009 http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5905a1.htm
2. U.S. Department of Justice Children’s Exposure to Violence: A Comprehensive National Survey https://www.ncjrs.gov/pdffiles1/ojjdp/227744.pdf
3. Centers for Disease Control and Prevention Youth Violence: Facts at a Glance http://www.cdc.gov/ViolencePrevention/pdf/yv-datasheet-a.pdf
4. Medical costs and productivity losses due to interpersonal and self-directed violence in the United States;Corso;Am J Prev Med.,2007
5. Emergency department utilization by adolescents in the United States;Ziv;Pediatrics.,1998