Sukantarat N, Uthaiwan K. Comparison of Postoperative Pain Scores between Intraoperative Intravenous Ketamine and Placebo in Patients Undergoing Unilateral Total Knee Arthroplasty under General Anesthesia: a Double-blind Randomized Controlled Trial. Thai J Anesthesiol [internet]. 2025 May 2 [cited 2026 Sep. 20];51(3):157-66. available from: https://he02.tci-thaijo.org/index.php/anesthai/article/view/275222