1. Berning A, Smither DD. Understanding the limitations of drug test information, reporting, and testing practices in fatal crashes. (Traffic Safety Facts Research Note. DOT HS 812 072) [Internet]. Washington, D.C.; 2014. Available from:
https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/812072
2. Brady JE, Li G. Trends in alcohol and other drugs detected in fatally injured drivers in the United States, 1999-2010. Am J Epidemiol. 2014;179(6):692–9.
3. California Health and Safety Code. §11362.7–11362.83; 1996
4. California Highway Patrol. Collision investigation manual HPM 110.5. Sacramento: California Highway Patrol; 2017.
5. California Highway Patrol. Statewide Integrated Traffic Records System [Internet]. Available from:
http://iswitrs.chp.ca.gov/Reports/jsp/userLogin.jsp