1. American Academy of Pain Medicine. Pain information and resources for patients seeking the care of a pain medicine professional. https://painmed.org/clinician-resources/patient-education-resources. Accessed March 29, 2018.
2. The high prevalence of pain in emergency medical care;Cordell;Am J Emerg Med,2002
3. Improving the quality of care through pain assessment and management;Wells,2008
4. NIH. NIH fact sheets - pain management. https://report.nih.gov/nihfactsheets/ViewFactSheet.aspx?csid=57. Accessed March 29, 2018.
5. The economic costs of pain in the United States;Gaskin;J Pain,2012