Sloan, MD, Paul A. “Case Studies of Long-Acting, Extended-Release, and Sustained-Release Opioids for the Treatment of Chronic Nonmalignant Pain”. Journal of Opioid Management 10, no. 7 (May 4, 2023). Accessed May 2, 2024. https://wmpllc.org/ojs/index.php/jom/article/view/3424.