Vitayaburananont P, Nuchpramool P. Assess Level of Post-operative Pain in Adult Patients who Underwent Elective Surgery Using Pre-printed Postoperative Pain Order in Vajira Hospital. Vajira Med J [internet]. 2020 Apr. 30 [cited 2026 Jan. 8];64(2):125-32. available from: https://he02.tci-thaijo.org/index.php/VMED/article/view/243514