1. 911 and E911 Services. Federal Communications Commission. 2017. Available at: https://www.fcc.gov/general/9-1-1-and-e9-1-1-services. Accessed July 24, 2017.
2. 9-1-1 Origin & History. National Emergency Number Association Website. Available at: http://www.nena.org/?page=911overviewfacts. Accessed July 24, 2017.
3. Next-Generation 9-1-1. Intelligent Transportation Systems Joint Program Office. Available at: https://www.its.dot.gov/research_archives/ng911/index.htm. Accessed July 24, 2017.
4. Basic principles and resuscitation;Malamed,2007
5. Preparing dental office staff members for emergencies;Hass;J Am Dental Assoc,2010