Mannino, MD, R., P. Coyne, MSN, APRN, C. Swainey, MD, L. A. Hansen, PharmD, and L. Lyckholm, MD. “Methadone for Cancer-Related Neuropathic Pain: A Review of the Literature”. Journal of Opioid Management, vol. 2, no. 5, Sept. 2006, pp. 269-76, doi:10.5055/jom.2006.0040.