1. Busse, J. W., Craigie, S., Juurlink, D. N., Buckley, D. N., Wang, L., Couban, R. J., Agoritsas, T., Akl, E. A., Carrasco-Labra, A., Cooper, L., Cull, C., da Costa, B. R., Frank, J. W., Grant, G., Iorio, A., Persaud, N., Stern, S., Tugwell, P., Vandvik, P. O., & Guyatt, G. H. (2017). Guideline for opioid therapy and chronic noncancer pain. Canadian Medical Association Journal, 189(18), E659–E666. https://doi.org/10.1503/cmaj.170363