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  Indian J Med Microbiol
 

Figure 1: Transverse ultrasound view at the subglottic level showing the trachea (TR), esophagus (O), and the measurement of the diameter of the trachea

Figure 1: Transverse ultrasound view at the subglottic level showing the trachea (TR), esophagus (O), and the measurement of the diameter of the trachea