Callon, BSc, C., E. Wood, PhD, D. Marsh, MD, K. Li, PhD, J. Montaner, MD, and T. Kerr, PhD. “Barriers and Facilitators to Methadone Maintenance Therapy Use Among Illicit Opiate Injection Drug Users in Vancouver”. Journal of Opioid Management, vol. 2, no. 1, Jan. 2006, pp. 35-41, doi:10.5055/jom.2006.0006.