1. ANSM: French National Agency for Medicines and Health Products Safety: Analysis of drug sales in France in 2013. Available at: http://ansm.sante.fr/var/ansm_site/storage/original/application/3df7b99f8f4c9ee634a6a9b094624341.pdf. Accessed July 11, 2016
2. Prevention of opioid abuse in chronic non-cancer pain: an algorithmic, evidence based approach;Atluri;Pain Physician,2012
3. Assessment of the trends in medical use and misuse of opioid analgesics from 2004 to 2011;Atluri;Pain Physician,2014
4. Opioid therapy for chronic pain;Ballantyne;N Engl J Med,2003
5. Opioid complications and side effects;Benyamin;Pain Physician,2008