1. Porche RA. Approaches to pain management: An essential guide for clinical leaders. The Joint Commission International. 2010. Available at: http://www.jointcommissioninternational.org/assets/1/14/APM10_Sample_Pages2.pdf. Accessed March 9, 2017.
2. WHO guidelines on the pharmacological treatment of persisting pain in children with medical illnesses,2012
3. Wurhman E, Cooney MF. Acute pain: assessment and treatment. Medscape. 2011. Available at: http://www.medscape.com/viewarticle/735034. Accessed March 9, 2017.
4. Pain. National Institutes of Health. 2016. Available at: https://nccih.nih.gov/health/pain. Accessed February 12, 2017.
5. AAPM facts and figures on pain. The American Academy of Pain Medicine. Available at: http://www.painmed.org/patientcenter/facts-on-pain/. Accessed February 12, 2017.