1. Tenore PL. Advanced urine toxicology testing. J Addict Dis. 2010;29(4):436–48.
2. Official Disability Guidelines (ODG), Treatment Index, 11th Edition (web), 2013, Pain (Chronic).
3. Chelminski PR, Ives TJ, Felix KM, Prakken SD, Miller TM, Perhac JS, Malone RM, Bryant ME, DeWalt DA, Pignone MP. A primary care, multi-disciplinary disease management program for opioid-treated patients with chronic non-cancer pain and a high burden of psychiatric comorbidity. BMC Health Serv Res. 2005;5(1):3.
4. Christo PJ, Manchikanti L, Ruan X, Bottros M, Hansen H, Solanki DR, Jordan AE, Colson J. Urine drug testing in chronic pain. Pain Physician. 2011;14(2):123–43.
5. Mikel C, Pesce AJ, Rosenthal M, West C. Therapeutic monitoring of benzodiazepines in the management of pain: current limitations of point of care immunoassays suggest testing by mass spectrometry to assure accuracy and improve patient safety. Clin Chim Acta. 2012;413(15–16):1199–202.