Simon, RPh, MD, Steven M., and Lee S. Schwartzberg, MD, FACP. “A Review of Rapid-Onset Opioids for Breakthrough Pain in Patients With Cancer”. Journal of Opioid Management 10, no. 3 (May 1, 2014): 207–215. Accessed May 4, 2024. https://wmpllc.org/ojs/index.php/jom/article/view/61.