Zimmermann, MD, Michael, Karin Friedrich, MD, and Rolf Kirchner, MD. “Electronically Monitored Single-Use Patient-Controlled Analgesia Pumps in Postoperative Pain Control”. Journal of Opioid Management 1, no. 5 (November 1, 2005): 267–272. Accessed November 22, 2024. https://wmpllc.org/ojs/index.php/jom/article/view/1082.