1. Opioid abuse in cancer pain: report of two cases and presentation of an algorithm of multidisciplinary care;Koyyalagunta;Pain Physician,2011
2. Undocumented alcoholism and its correlation with tobacco and illegal drug use in advanced cancer patients;Dev;Cancer,2011
3. Substance Abuse and Mental Health Services Administration Prescription Drug Misuse and Abuse http://www.samhsa.gov/prescription-drug-misuse-abuse
4. National Institute on Drug Abuse Trends & Statistics http://www.drugabuse.gov/related-topics/trends-statistics