1. Increase in fatal poisonings involving opioid analgesics in the United States, 1999–2006;Warner;NCHS Data Brief,2009
2. Increasing deaths from opioid analgesics in the United States
3. Reason J . The nature of error. Human Error. New York, NY: Cambridge University Press; 1990:4.
4. Webster LR Dove B Murphy A . Select medical-legal reviews of unintentional overdose deaths. Presented at 2010 AAPM Annual Meeting, February 3–6, 2010, San Antonio, TX.
5. Prescribing information for Dolophine® hydrochloride CII (methadone hydrochloride tablets, USP) 5 mg, 10 mg. Roxane Laboratories, Inc. Columbus, Ohio, November 27, 2006. Available at: http://www.fda.gov/downloads/Drugs/DrugSafety/PostmarketDrugSafetyInformationforPatientsandProviders/UCM142842.pdf (accessed July 2010).