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3. The influence of passengers on older drivers involved in fatal crashes;Bédard;Exp. Aging Res.,2004
4. Centers for Disease Control and Prevention, 2008. Web-based Injury Statistics Query and Reporting System (WISQARS): Leading Causes of Death Reports 1999–2005 [On-line]. http://webappa.cdc.gov/sasweb/ncipc/leadcaus10.html.
5. Traffic Safety Facts Comparison of Crash Fatalities by Sex and Age Group;Chang,2008