Manandhar S, Manandhar K. Efficacy of intravenous Tramadol in prevention of catheter-related bladder discomfort in upper urinary tract surgery. JPAHS [Internet]. 2019 Dec. 31 [cited 2025 Apr. 30];6(2):45-50. Available from: https://jpahs.edu.np/index.php/jpahs/article/view/161