C. T. Hartrick, MD, D. M. Knapke, MD, L. Ding, MS, MA, H. Danesi, MD, and J. B. Jones, MD, “Fentanyl iontophoretic transdermal system versus morphine intravenous patient-controlled analgesia for pain management following orthopedic surgery: A pooled analysis of randomized, controlled trials”, J of Opioid Management, vol. 12, no. 1, pp. 37–45, Jan. 2016.