Rauck, MD RL, Bookbinder, MD SA, Bunker, MD TR, Alftine, MD CD, Gershon, MD S, de Jong, MD E, Negro-Vilar, MD, PhD A, Ghalie, MD R. 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. J of Opioid Management [Internet]. 2007 Jan. 1 [cited 2024 Nov. 22];3(1):35-43. Available from: https://wmpllc.org/ojs/index.php/jom/article/view/1164