Ghazaly H, Eldemrdash A, Atito B, Abdelrheem S, A. Aly A. Fentanyl versus tramadol as an adjunct to bupivacaine in ultrasound-guided supraclavicular brachial plexus blockade: pros and cons. apic [Internet]. 3Aug.2021 [cited 21Nov.2024];25(4):450-7. Available from: https://mail.apicareonline.com/index.php/APIC/article/view/1565