Rana, R. B., Rahman, Z., Aziz, L., Akhtaruzzaman, A., & Iqbal, K. M. (2010). A Study on Epidural Tramadol Compared with Epidural Fentanyl Combined with Low Dose Bupivacaine for the Control of Metastatic Cancer Pain. Bangabandhu Sheikh Mujib Medical University Journal, 2(2), 66–72. https://doi.org/10.3329/bsmmuj.v2i2.4760