Iamaroon, A. “Moderate-to-Severe Pain after Knee Arthroplasty: A Retrospective Study of Incidence and Risk Factors”. Thai Journal of Anesthesiology, vol. 46, no. 2, Mar. 2020, pp. 71-79, https://he02.tci-thaijo.org/index.php/anesthai/article/view/240185.