Richards, MD, PhD, P., Riff, MD, D., Kelen, RN, R., & Stern, PhD, W. (2018). Analgesic and adverse effects of a fixed-ratio morphine-oxycodone combination (MoxDuo®) in the treatment of postoperative pain. Journal of Opioid Management, 7(3), 217–228. https://doi.org/10.5055/jom.2011.0064