Mathew, L. M., Mathew, L., Cherian, V. and David, A. (2022) “Effect of Epidural Ketamine on Pain after Total Knee Arthroplasty: A Randomized Double- Blind Placebo Controlled Clinical Trial”, Christian Journal for Global Health, 9(1), pp. 77-86. doi: 10.15566/cjgh.v9i1.641.