1. Variability in risk of gastrointestinal complicationswith individual non-steroidal anti-inflammatorydrugs: results of a collaborative meta-analysis;Henry;BMJ,1996
2. Prescription drug abuse: what is being doneto address this new drug epidemic? Testimony before theSubcommittee on Criminal Justice, Drug Policy and HumanResources;Manchikanti;Pain Physician.,2006 Oct
3. Substance abusein the United States: findings from recent epidemiologic studies;Schulden;Curr Psychiatry Rep.,2009 Oct
4. US Code http://www4.law.cornell.edu/uscode/html/uscode21/usc_sec_21_00000812--000-.html
5. FDA takes actions on Darvon, other pain medicationscontaining propoxyphene http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm170769.htm