Sombood, Pattharaporn, Kornnika Yankan, Ingpisa Sritanapongsa, Alisa Wanpetch, and Phongthara Vichitvejpaisal. 2023. “Impending Hypovolemia in Elderly Patients Under Anesthesia”. Thai Journal of Anesthesiology 49 (5):345-50. https://he02.tci-thaijo.org/index.php/anesthai/article/view/264828.