Sellers, MD, PhD, FRCPC, E. M., Schuller, MSc, R., Romach, MD, M. K., & Horbay, PhD, G. L. A. (2006). Relative abuse potential of opioid formulations in Canada: A structured field study. Journal of Opioid Management, 2(4), 219–227. https://doi.org/10.5055/jom.2006.0034