Gamborg, RN, H., J. Riis, RN, L. Christrup, MSc (Pharm), PhD, and T. Krantz, MD. “Effect of Intraoral and Subcutaneous Morphine on Dyspnea at Rest in Terminal Patients With Primary Lung Cancer or Lung Metastases”. Journal of Opioid Management, vol. 9, no. 4, July 2013, pp. 269-74, doi:10.5055/jom.2013.0168.