1. Mandatory guidelines and proposed revisions to mandatory guidelines for federal workplace drug testing programs; Notices Section 2.4 Laboratory Analysis Procedures (f) (1) confirmatory drug test.;Federal Register,2004
2. Urine drug testing of chronic pain patients: licit and illicit drug patterns.;Cone;J Anal Toxicol,2008
3. Controlled substance abuse in illicit drug use in chronic pain patients: an evaluation of multiple variables.;Manchikanti;Pain Physician,2006
4. Opioid guidelines in the management of chronic non-cancer pain.;Trestcott;Pain Physician,2006