Le X, Nguyen ML, Nguyen DT, Do TH, Nguyen HG. Combined nefopam-fentanyl use in PCA for postoperative analgesia in spinal surgery patients: a randomized, controlled, single-blind trial. apic [Internet]. 8Aug.2024 [cited 11Aug.2024];28(4):687-91. Available from: https://apicareonline.com/index.php/APIC/article/view/2370