Wongswadiwat, Malinee, and Thanat Yotepanya. 2017. “Endotracheal Tube-Assisted Nasogastric Tube Insertion in Anaesthetized and Intubated Patients”. Srinagarind Medical Journal 32 (4):55. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/94298.