Vorsanger, PhD, MD, G., Xiang, PhD, J., Okamoto, ScD, A., Upmalis, MD, D. and Moskovitz, MD, B. 2018. Evaluation of study discontinuations with tapentadol immediate release and oxycodone immediate release in patients with low back or osteoarthritis pain. Journal of Opioid Management. 6, 3 (Jan. 2018), 169–179. DOI:https://doi.org/10.5055/jom.2010.0015.