Chinachot, Thitima, Poomjai Turasakul, Chalinee Wachjanawach, and Nichapat Sooksri. “Incidence, severity and factors lead to abnormal pre-operative blood chemistry, CBC, Chest X-ray and EKG in routine preoperative investigation”. Thai Journal of Anesthesiology 42, no. 2 (June 30, 2016): 69–87. accessed September 21, 2026. https://he02.tci-thaijo.org/index.php/anesthai/article/view/61106.