Rattanamongkolgul, Duangduan, Napapat Thongkamwong, and Prapan Phetlerthirunkul. 2020. “Endotracheal suctioning guideline of intubated adults”. Journal of Medicine and Health Sciences 27 (3):145-56. https://he01.tci-thaijo.org/index.php/jmhs/article/view/246840.