Rajaratnam, MD, R., D. Sivesind, PhD, M. Todman, PhD, D. Roane, MD, and R. Seewald, MD. “The Aging Methadone Maintenance Patient: Treatment Adjustment, Long-Term Success, and Quality of Life”. Journal of Opioid Management, vol. 5, no. 1, Jan. 2018, pp. 27-37, doi:10.5055/jom.2009.0004.