1. Patient Education. U.S. Department of Veterans Affairs, Washington DC; Last updated. 2016. http://www.va.gov/LIBRARY/Patient_Education.asp . Accessed 25 Nov 2016.
2. VA/DoD Clinical Practice Guidelines 2010. U.S. Department of Veterans Affairs, Washington DC; Last updated. 2015. http://www.healthquality.va.gov/guidelines/Pain/cot/ . Accessed 25 Nov 2016.
3. Chou R, Fanciullo GJ, Fine PG, Adler JA, Ballantyne JC, Davies P, et al. Clinical guidelines for the use of chronic opioid therapy in chronic noncancer pain. J Pain. 2009;10:113–30.
4. Hughes RG. Patient safety and quality: an evidence-based handbook for nurses. Rockville: U.S. Department of Health and Human Services; 2008. AHRQ Publication No. 08–0043.
5. Durbin Jr CG. Tracheostomy: why, when, and how? Respir Care. 2010;55:1056–68.