@book {2053, title = {Trends in Outpatient Prescription Analgesics Utilization and Expenditures for the U.S. Civilian Noninstitutionalized Population, 1996 and 2006}, series = {Statistical brief}, number = {$\#$235}, year = {2009}, publisher = {Agency for Healthcare Research and Quality}, organization = {Agency for Healthcare Research and Quality}, address = {Rockville, Md.}, author = {Marie N Stagnitti} }