Khan, F, N Ahmad, N Iqbal, and AM Kamal. “Physicians Knowledge and Attitude of Opioid Availability, Accessibility and Use in Pain Management in Bangladesh”. Bangladesh Medical Research Council Bulletin 40, no. 1 (September 4, 2014): 18–24. Accessed December 1, 2022. https://banglajol.info/index.php/BMRCB/article/view/20324.