1. Development of a self-report screening instrument for assessing potential oopioid medication misuse in chronic pain patients;Adams;Journal of Pain and Symptom Management,2004
2. Oxford textbook of palliative social work;Altilio,2011
3. American Academy of Pain Medicine (2012). AAPM facts and figures on pain. Retrieved July 15, 2012, from http://www.painmed.org/patientcenter/facts_on_pain.aspx.
4. American Psychiatric Association (2012). DSM-5 development. Retrieved July 28, 2012, from http://www.dsm5.org/Pages/Default.aspx.
5. American Society of Addiction Medicine (2012). Definition of addiction. Retrieved July 27, 2012, from http://www.asam.org/for-the-public/definition-of-addiction.