Biondi, DO, D.M., Xiang, PhD, J., Etropolski, MD, M. and Moskovitz, MD, B. 2015. Tolerability and efficacy of tapentadol extended release in elderly patients ≥75 years of age with chronic osteoarthritis knee or low back pain. Journal of Opioid Management. 11, 5 (Sep. 2015), 393–403. DOI:https://doi.org/10.5055/jom.2015.0289.