Sowmya Madihalli Janardhan Iyengar, Shankar Kantharaju, Shubha Mysore Ramesh. Efficacy of intraoperative subanaesthetic dose of ketamine on post-operative analgesia for patients undergoing single level lumbar discectomy under general anesthesia: A placebo control randomized clinical study. Asian J Med Sci. 2023;14(11):53-59. doi:10.3126/ajms.v14i11.56489