Sato, MD T, Kikura, MD M, Sato, MD, PhD S. The characteristics of postoperative fentanyl effect-site concentration during intravenous fentanyl analgesia after posterior lumbar spine fusion. J of Opioid Management [Internet]. 2013 Sep. 1 [cited 2024 Nov. 24];9(5):335-42. Available from: https://wmpllc.org/ojs/index.php/jom/article/view/643