Observational Study
Copyright ©The Author(s) 2021.
World J Radiol. Feb 28, 2021; 13(2): 40-52
Published online Feb 28, 2021. doi: 10.4329/wjr.v13.i2.40
Figure 4
Figure 4 Horizontal section showing airway. A: Nasal; B: Superior; C: Middle; D and E: Inferior airway.