Yadav, T., Golhar, M., Johar, S., Malhotra, N. and Gupta, R. (2021) “A study to evaluate the efficacy of instillation of ropivacaine with tramadol through surgical drains for post-operative analgesia in patients undergoing mastectomy”, Asian Journal of Medical Sciences, 12(6), pp. 23–28. doi: 10.3126/ajms.v12i6.34795.