Every reference with a DOI in the deposited reference list resolved to a known
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Trends in prescription drug abuse and dependence, co-occurrence with other substance use disorders, and treatment utilization: Results from two national surveys
The 5 references without a DOI — listed, not checked
no DOI — not checkedBritish Pain Society. Opioids for persistent pain: good practice. Unpublished consensus statement, 2010. Retrieved November 28, 2011 from http://www.britishpainsociety.org/book_opioid_main.pdf.
no DOI — not checkedNational Opioid Use Guideline Group. Canadian guideline for safe and effective use of opioids for chronic non-cancer pain. 2010. Retrieved November 28, 2011, from http://nationalpaincentre.mcmaster.ca/opioid/documents.html.
no DOI — not checkedWashington State Agency Medical Directors Group. Interagency guideline on opioid dosing for chronic non-cancer pain: an educational aid to improve care and safety with opioid therapy. 2010. Retrieved November 28, 2011, from http://www.agencymeddirectors.wa.gov/Files/OpioidGdline.pdf.
no DOI — not checkedGroup Health Cooperative
no DOI — not checkedKaiser Permanente medical care program
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