Penson, MRCP, MD, R.T., Joel, PhD, S.P., Gloyne, BSc, A., Clark, BSc, S. and Slevin, FRCP, MD, M.L. 2005. Morphine analgesia in cancer pain: Role of the glucuronides. Journal of Opioid Management. 1, 2 (May 2005), 83–90. DOI:https://doi.org/10.5055/jom.2005.0021.