Comparison of 0.25% Bupivacaine with Tramadol Versus 0.125% Bupivacaine with Tramadol in Epidural B Analgesia for Labor Pain. mfm [Internet]. 2024 Apr. 7 [cited 2025 Dec. 26];33(5). Available from: https://medicalforummonthly.com/index.php/mfm/article/view/713