Rauck, MD, R. L., S. A. Bookbinder, MD, T. R. Bunker, MD, C. D. Alftine, MD, R. Ghalie, MD, A. Negro-Vilar, MD, PhD, E. de Jong, MD, and S. Gershon, MD. “A Randomized, Open-Label Study of Once-a-Day AVINZA® (morphine Sulfate Extended-Release Capsules) Versus Twice-a-Day OxyContin® (oxycodone Hydrochloride Controlled-Release Tablets) for Chronic Low Back Pain: The Extension Phase of the ACTION Trial”. Journal of Opioid Management, vol. 2, no. 6, Nov. 2006, pp. 325-33, doi:10.5055/jom.2006.0048.