Jacobsen, MS, MPH, R., Sjøgren, MD, DMS, P., Møldrup, PhD, C. and Christrup, PhD, L. 2007. Physician-related barriers to cancer pain management with opioid analgesics: A systematic review. Journal of Opioid Management. 3, 4 (Jul. 2007), 207–214. DOI:https://doi.org/10.5055/jom.2007.0006.