M. . Nasr Isfahani and E. Nasri Nasrabadi, “Comparison of Digital (Two-finger) and Video Laryngoscopy Methods during Nasogastric Tube Insertion in Intubated Patients: Digital (Two-finger) and Video Laryngoscopy Methods during NGT Insertion”, Arch Acad Emerg Med, vol. 9, no. 1, p. e55, Aug. 2021.