Yadav T, Golhar M, Johar S, Malhotra N, Gupta R. A study to evaluate the efficacy of instillation of ropivacaine with tramadol through surgical drains for post-operative analgesia in patients undergoing mastectomy. Asian J Med Sci [Internet]. 2021 Jun. 1 [cited 2024 Jun. 30];12(6):23-8. Available from: https://nepjol.info/index.php/AJMS/article/view/34795