Boontoterm, P., P. Fuengfoo, and P. Wacharasint. “Comparison of mean systemic pressure in patients with acute circulatory failure receiving passive leg raising vs. pneumatic leg compression.: Mean systemic pressure between PLR and PC”. Clinical Critical Care, vol. 29, Sept. 2021, p. 2021:e0003, https://he02.tci-thaijo.org/index.php/ccc/article/view/252074.