Rauck, MD, Richard L., Stephen A. Bookbinder, MD, Timothy R. Bunker, MD, Christopher D. Alftine, MD, Steven Gershon, MD, Egbert de Jong, MD, Andres Negro-Vilar, MD, PhD, and Richard Ghalie, MD. 2007. “A Randomized, Open-Label, Multicenter Trial Comparing Once-a-Day AVINZA® (morphine Sulfate Extended-Release Capsules) Versus Twice-a-Day OxyContin® (oxycodone Hydrochloride Controlled-Release Tablets) for the Treatment of Chronic, Moderate to Severe Low Back Pain: Improved Physical Functioning in the ACTION Trial”. Journal of Opioid Management 3 (1):35-43. https://doi.org/10.5055/jom.2007.0037.