RT Journal T1 A role for opioids in chronic pain management JF Archives of Internal Medicine JO Archives of Internal Medicine YR 2012 FD May 28 VO 172 IS 10 SP 824 OP 825 DO 10.1001/archinternmed.2012.882 UL http://dx.doi.org/10.1001/archinternmed.2012.882 AB