Reference:
Prescription Drug Overdose in the United States: Fact Sheet
http://www.cdc.gov/homeandrecreationalsafety/overdose/facts.html
THE TRUTH ABOUT PRESCRIPTION DRUG ABUSE » INTERNATIONAL STATISTICS
http://www.drugfreeworld.org/drugfacts/prescription/abuse-international-statistics.html
America’s Addiction to Opioids: Heroin and Prescription Drug Abuse
Purdue Pharma, OxyContin and Hitler
http://www.novusdetox.com/press/dependence.php?include=139550
OxyContin: Purdue Pharma's painful medicine
http://fortune.com/2011/11/09/oxycontin-purdue-pharmas-painful-medicine/
Narcotic Maker Guilty of Deceit Over Marketing
http://www.nytimes.com/2007/05/11/business/11drug.html?pagewanted=all&_r=0
OxyContin Patent Expiry Poses Tough Choice For Ottawa
http://www.huffingtonpost.ca/2012/11/08/oxycontin-patent-expiry_n_2091797.html
Critics allege OxyNEO was introduced in Canada because of impending patent expiry